Finding the Fourth Proportional to 9,876.78, 14,820.99 and 3,641.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,876.78 : 14,820.99 = 3,641.18 : x
2. Step 2: Convert to fraction form
   9,876.78/14,820.99 = 3,641.18/x
3. Step 3: Cross multiply
   9,876.78x = 14,820.99 × 3,641.18
4. Step 4: Simplify right side
   9,876.78x = 53,965,892.37
5. Step 5: Solve for x
   x = 53,965,892.37/9,876.78
6. Step 6: Final answer
   x = 5,463.92