Finding the Fourth Proportional to 101,250, 139,725.12 and 56,538

Step by Step Solution

1. Step 1: Write the proportion equation
   101,250 : 139,725.12 = 56,538 : x
2. Step 2: Convert to fraction form
   101,250/139,725.12 = 56,538/x
3. Step 3: Cross multiply
   101,250x = 139,725.12 × 56,538
4. Step 4: Simplify right side
   101,250x = 7,899,778,834.56
5. Step 5: Solve for x
   x = 7,899,778,834.56/101,250
6. Step 6: Final answer
   x = 78,022.51