Finding the Fourth Proportional to 111,049.96, 153,152.06 and 78,720.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111,049.96 : 153,152.06 = 78,720.62 : x
2. Step 2: Convert to fraction form
   111,049.96/153,152.06 = 78,720.62/x
3. Step 3: Cross multiply
   111,049.96x = 153,152.06 × 78,720.62
4. Step 4: Simplify right side
   111,049.96x = 12,056,225,117.48
5. Step 5: Solve for x
   x = 12,056,225,117.48/111,049.96
6. Step 6: Final answer
   x = 108,565.78