Finding the Fourth Proportional to 107,881.98, 161,877.54 and 72,747.78

Step by Step Solution

1. Step 1: Write the proportion equation
   107,881.98 : 161,877.54 = 72,747.78 : x
2. Step 2: Convert to fraction form
   107,881.98/161,877.54 = 72,747.78/x
3. Step 3: Cross multiply
   107,881.98x = 161,877.54 × 72,747.78
4. Step 4: Simplify right side
   107,881.98x = 11,776,231,666.86
5. Step 5: Solve for x
   x = 11,776,231,666.86/107,881.98
6. Step 6: Final answer
   x = 109,158.47