Finding the Fourth Proportional to 113,981.88, 157,148.81 and 78,109.62

Step by Step Solution

1. Step 1: Write the proportion equation
   113,981.88 : 157,148.81 = 78,109.62 : x
2. Step 2: Convert to fraction form
   113,981.88/157,148.81 = 78,109.62/x
3. Step 3: Cross multiply
   113,981.88x = 157,148.81 × 78,109.62
4. Step 4: Simplify right side
   113,981.88x = 12,274,833,145.61
5. Step 5: Solve for x
   x = 12,274,833,145.61/113,981.88
6. Step 6: Final answer
   x = 107,691.09