Finding the Third Proportional to 57,106.90 and 83,712.55

Step by Step Solution

1. Step 1: Write the proportion equation
   57,106.90 : 83,712.55 = 83,712.55 : x
2. Step 2: Convert to fraction form
   57,106.90/83,712.55 = 83,712.55/x
3. Step 3: Cross multiply
   57,106.90x = 83,712.55 × 83,712.55
4. Step 4: Simplify right side
   57,106.90x = 7,007,791,158.30
5. Step 5: Solve for x
   x = 7,007,791,158.30/57,106.90
6. Step 6: Final answer
   x = 122,713.57