Finding the Fourth Proportional to 105,311.24, 157,830.78 and 78,808.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,311.24 : 157,830.78 = 78,808.04 : x
2. Step 2: Convert to fraction form
   105,311.24/157,830.78 = 78,808.04/x
3. Step 3: Cross multiply
   105,311.24x = 157,830.78 × 78,808.04
4. Step 4: Simplify right side
   105,311.24x = 12,438,334,423.47
5. Step 5: Solve for x
   x = 12,438,334,423.47/105,311.24
6. Step 6: Final answer
   x = 118,110.23