Finding the Fourth Proportional to 152,961.71, 229,418.84 and 78,137.15

Step by Step Solution

1. Step 1: Write the proportion equation
   152,961.71 : 229,418.84 = 78,137.15 : x
2. Step 2: Convert to fraction form
   152,961.71/229,418.84 = 78,137.15/x
3. Step 3: Cross multiply
   152,961.71x = 229,418.84 × 78,137.15
4. Step 4: Simplify right side
   152,961.71x = 17,926,133,362.15
5. Step 5: Solve for x
   x = 17,926,133,362.15/152,961.71
6. Step 6: Final answer
   x = 117,193.60