Finding the Fourth Proportional to 2,385.88, 3,579.02 and 654.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.88 : 3,579.02 = 654.50 : x
2. Step 2: Convert to fraction form
   2,385.88/3,579.02 = 654.50/x
3. Step 3: Cross multiply
   2,385.88x = 3,579.02 × 654.50
4. Step 4: Simplify right side
   2,385.88x = 2,342,468.59
5. Step 5: Solve for x
   x = 2,342,468.59/2,385.88
6. Step 6: Final answer
   x = 981.80