Finding the Fourth Proportional to 111,584.59, 153,910.29 and 71,280.46

Step by Step Solution

1. Step 1: Write the proportion equation
   111,584.59 : 153,910.29 = 71,280.46 : x
2. Step 2: Convert to fraction form
   111,584.59/153,910.29 = 71,280.46/x
3. Step 3: Cross multiply
   111,584.59x = 153,910.29 × 71,280.46
4. Step 4: Simplify right side
   111,584.59x = 10,970,796,269.93
5. Step 5: Solve for x
   x = 10,970,796,269.93/111,584.59
6. Step 6: Final answer
   x = 98,318.20