Finding the Third Proportional to 2,139,973,816.50 and 4,340,118,826.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,973,816.50 : 4,340,118,826.50 = 4,340,118,826.50 : x
2. Step 2: Convert to fraction form
   2,139,973,816.50/4,340,118,826.50 = 4,340,118,826.50/x
3. Step 3: Cross multiply
   2,139,973,816.50x = 4,340,118,826.50 × 4,340,118,826.50
4. Step 4: Simplify right side
   2,139,973,816.50x = 18,836,631,428,139,737,088
5. Step 5: Solve for x
   x = 18,836,631,428,139,737,088/2,139,973,816.50
6. Step 6: Final answer
   x = 8,802,271,917.02