Finding the Fourth Proportional to 101,425.50, 139,973.67 and 56,713.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,425.50 : 139,973.67 = 56,713.50 : x
2. Step 2: Convert to fraction form
   101,425.50/139,973.67 = 56,713.50/x
3. Step 3: Cross multiply
   101,425.50x = 139,973.67 × 56,713.50
4. Step 4: Simplify right side
   101,425.50x = 7,938,396,733.55
5. Step 5: Solve for x
   x = 7,938,396,733.55/101,425.50
6. Step 6: Final answer
   x = 78,268.25