Finding the Fourth Proportional to 111,429.24, 153,772.38 and 61,128.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111,429.24 : 153,772.38 = 61,128.60 : x
2. Step 2: Convert to fraction form
   111,429.24/153,772.38 = 61,128.60/x
3. Step 3: Cross multiply
   111,429.24x = 153,772.38 × 61,128.60
4. Step 4: Simplify right side
   111,429.24x = 9,399,890,308.07
5. Step 5: Solve for x
   x = 9,399,890,308.07/111,429.24
6. Step 6: Final answer
   x = 84,357.48