Finding the Fourth Proportional to 111,543.15, 167,314.92 and 78,411.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111,543.15 : 167,314.92 = 78,411.42 : x
2. Step 2: Convert to fraction form
   111,543.15/167,314.92 = 78,411.42/x
3. Step 3: Cross multiply
   111,543.15x = 167,314.92 × 78,411.42
4. Step 4: Simplify right side
   111,543.15x = 13,119,400,464.39
5. Step 5: Solve for x
   x = 13,119,400,464.39/111,543.15
6. Step 6: Final answer
   x = 117,617.27