Finding the Fourth Proportional to 100,826.72, 139,139.52 and 56,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   100,826.72 : 139,139.52 = 56,114.72 : x
2. Step 2: Convert to fraction form
   100,826.72/139,139.52 = 56,114.72/x
3. Step 3: Cross multiply
   100,826.72x = 139,139.52 × 56,114.72
4. Step 4: Simplify right side
   100,826.72x = 7,807,775,205.73
5. Step 5: Solve for x
   x = 7,807,775,205.73/100,826.72
6. Step 6: Final answer
   x = 77,437.56