Finding the Fourth Proportional to 103,013.25, 142,151.22 and 57,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103,013.25 : 142,151.22 = 57,071.31 : x
2. Step 2: Convert to fraction form
   103,013.25/142,151.22 = 57,071.31/x
3. Step 3: Cross multiply
   103,013.25x = 142,151.22 × 57,071.31
4. Step 4: Simplify right side
   103,013.25x = 8,112,756,343.50
5. Step 5: Solve for x
   x = 8,112,756,343.50/103,013.25
6. Step 6: Final answer
   x = 78,754.49