Finding the Fourth Proportional to 113,711.12, 156,985.52 and 78,848.72

Step by Step Solution

1. Step 1: Write the proportion equation
   113,711.12 : 156,985.52 = 78,848.72 : x
2. Step 2: Convert to fraction form
   113,711.12/156,985.52 = 78,848.72/x
3. Step 3: Cross multiply
   113,711.12x = 156,985.52 × 78,848.72
4. Step 4: Simplify right side
   113,711.12x = 12,378,107,310.53
5. Step 5: Solve for x
   x = 12,378,107,310.53/113,711.12
6. Step 6: Final answer
   x = 108,855.73