Finding the Fourth Proportional to 111,381.12, 153,705.72 and 61,080

Step by Step Solution

1. Step 1: Write the proportion equation
   111,381.12 : 153,705.72 = 61,080 : x
2. Step 2: Convert to fraction form
   111,381.12/153,705.72 = 61,080/x
3. Step 3: Cross multiply
   111,381.12x = 153,705.72 × 61,080
4. Step 4: Simplify right side
   111,381.12x = 9,388,345,377.60
5. Step 5: Solve for x
   x = 9,388,345,377.60/111,381.12
6. Step 6: Final answer
   x = 84,290.28