Finding the Fourth Proportional to 101,401.29, 139,928.13 and 56,076.57

Step by Step Solution

1. Step 1: Write the proportion equation
   101,401.29 : 139,928.13 = 56,076.57 : x
2. Step 2: Convert to fraction form
   101,401.29/139,928.13 = 56,076.57/x
3. Step 3: Cross multiply
   101,401.29x = 139,928.13 × 56,076.57
4. Step 4: Simplify right side
   101,401.29x = 7,846,689,576.91
5. Step 5: Solve for x
   x = 7,846,689,576.91/101,401.29
6. Step 6: Final answer
   x = 77,382.54