Finding the Fourth Proportional to 100,825.38, 139,139.02 and 56,123.94

Step by Step Solution

1. Step 1: Write the proportion equation
   100,825.38 : 139,139.02 = 56,123.94 : x
2. Step 2: Convert to fraction form
   100,825.38/139,139.02 = 56,123.94/x
3. Step 3: Cross multiply
   100,825.38x = 139,139.02 × 56,123.94
4. Step 4: Simplify right side
   100,825.38x = 7,809,030,010.14
5. Step 5: Solve for x
   x = 7,809,030,010.14/100,825.38
6. Step 6: Final answer
   x = 77,451.03