Finding the Fourth Proportional to 2,601.86, 3,902.47 and 654.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.86 : 3,902.47 = 654.05 : x
2. Step 2: Convert to fraction form
   2,601.86/3,902.47 = 654.05/x
3. Step 3: Cross multiply
   2,601.86x = 3,902.47 × 654.05
4. Step 4: Simplify right side
   2,601.86x = 2,552,418.62
5. Step 5: Solve for x
   x = 2,552,418.62/2,601.86
6. Step 6: Final answer
   x = 981.00