Finding the Fourth Proportional to 101,278.86, 139,761.90 and 55,955.94

Step by Step Solution

1. Step 1: Write the proportion equation
   101,278.86 : 139,761.90 = 55,955.94 : x
2. Step 2: Convert to fraction form
   101,278.86/139,761.90 = 55,955.94/x
3. Step 3: Cross multiply
   101,278.86x = 139,761.90 × 55,955.94
4. Step 4: Simplify right side
   101,278.86x = 7,820,508,490.69
5. Step 5: Solve for x
   x = 7,820,508,490.69/101,278.86
6. Step 6: Final answer
   x = 77,217.58