Finding the Fourth Proportional to 130,967.50, 180,779.39 and 85,089.91

Step by Step Solution

1. Step 1: Write the proportion equation
   130,967.50 : 180,779.39 = 85,089.91 : x
2. Step 2: Convert to fraction form
   130,967.50/180,779.39 = 85,089.91/x
3. Step 3: Cross multiply
   130,967.50x = 180,779.39 × 85,089.91
4. Step 4: Simplify right side
   130,967.50x = 15,382,501,333.78
5. Step 5: Solve for x
   x = 15,382,501,333.78/130,967.50
6. Step 6: Final answer
   x = 117,452.82