Finding the Fourth Proportional to 10,980.64, 16,474.62 and 3,585.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,980.64 : 16,474.62 = 3,585.40 : x
2. Step 2: Convert to fraction form
   10,980.64/16,474.62 = 3,585.40/x
3. Step 3: Cross multiply
   10,980.64x = 16,474.62 × 3,585.40
4. Step 4: Simplify right side
   10,980.64x = 59,068,102.55
5. Step 5: Solve for x
   x = 59,068,102.55/10,980.64
6. Step 6: Final answer
   x = 5,379.30