Finding the Fourth Proportional to 101,243.50, 139,716.03 and 56,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,243.50 : 139,716.03 = 56,531.50 : x
2. Step 2: Convert to fraction form
   101,243.50/139,716.03 = 56,531.50/x
3. Step 3: Cross multiply
   101,243.50x = 139,716.03 × 56,531.50
4. Step 4: Simplify right side
   101,243.50x = 7,898,356,749.95
5. Step 5: Solve for x
   x = 7,898,356,749.95/101,243.50
6. Step 6: Final answer
   x = 78,013.47