Finding the Fourth Proportional to 111,853.12, 167,779.50 and 76,686.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,853.12 : 167,779.50 = 76,686.16 : x
2. Step 2: Convert to fraction form
   111,853.12/167,779.50 = 76,686.16/x
3. Step 3: Cross multiply
   111,853.12x = 167,779.50 × 76,686.16
4. Step 4: Simplify right side
   111,853.12x = 12,866,365,581.72
5. Step 5: Solve for x
   x = 12,866,365,581.72/111,853.12
6. Step 6: Final answer
   x = 115,029.12