Finding the Third Proportional to 70,639.13 and 99,000.56

Step by Step Solution

1. Step 1: Write the proportion equation
   70,639.13 : 99,000.56 = 99,000.56 : x
2. Step 2: Convert to fraction form
   70,639.13/99,000.56 = 99,000.56/x
3. Step 3: Cross multiply
   70,639.13x = 99,000.56 × 99,000.56
4. Step 4: Simplify right side
   70,639.13x = 9,801,111,375.32
5. Step 5: Solve for x
   x = 9,801,111,375.32/70,639.13
6. Step 6: Final answer
   x = 138,749.05