Finding the Fourth Proportional to 111,584.89, 153,910.73 and 71,280.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111,584.89 : 153,910.73 = 71,280.76 : x
2. Step 2: Convert to fraction form
   111,584.89/153,910.73 = 71,280.76/x
3. Step 3: Cross multiply
   111,584.89x = 153,910.73 × 71,280.76
4. Step 4: Simplify right side
   111,584.89x = 10,970,873,888.56
5. Step 5: Solve for x
   x = 10,970,873,888.56/111,584.89
6. Step 6: Final answer
   x = 98,318.63