Finding the Third Proportional to 42,070.50 and 57,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,070.50 : 57,057.75 = 57,057.75 : x
2. Step 2: Convert to fraction form
   42,070.50/57,057.75 = 57,057.75/x
3. Step 3: Cross multiply
   42,070.50x = 57,057.75 × 57,057.75
4. Step 4: Simplify right side
   42,070.50x = 3,255,586,835.06
5. Step 5: Solve for x
   x = 3,255,586,835.06/42,070.50
6. Step 6: Final answer
   x = 77,384.08