Finding the Third Proportional to 7,988,284.50 and 12,978,340.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,988,284.50 : 12,978,340.50 = 12,978,340.50 : x
2. Step 2: Convert to fraction form
   7,988,284.50/12,978,340.50 = 12,978,340.50/x
3. Step 3: Cross multiply
   7,988,284.50x = 12,978,340.50 × 12,978,340.50
4. Step 4: Simplify right side
   7,988,284.50x = 168,437,322,133,940.25
5. Step 5: Solve for x
   x = 168,437,322,133,940.25/7,988,284.50
6. Step 6: Final answer
   x = 21,085,543.73