Finding the Fourth Proportional to 288,499.50, 432,695.79 and 78,110.10

Step by Step Solution

1. Step 1: Write the proportion equation
   288,499.50 : 432,695.79 = 78,110.10 : x
2. Step 2: Convert to fraction form
   288,499.50/432,695.79 = 78,110.10/x
3. Step 3: Cross multiply
   288,499.50x = 432,695.79 × 78,110.10
4. Step 4: Simplify right side
   288,499.50x = 33,797,911,426.48
5. Step 5: Solve for x
   x = 33,797,911,426.48/288,499.50
6. Step 6: Final answer
   x = 117,150.68