Finding the Fourth Proportional to 12,291.10, 18,439.89 and 3,526.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,291.10 : 18,439.89 = 3,526.72 : x
2. Step 2: Convert to fraction form
   12,291.10/18,439.89 = 3,526.72/x
3. Step 3: Cross multiply
   12,291.10x = 18,439.89 × 3,526.72
4. Step 4: Simplify right side
   12,291.10x = 65,032,328.86
5. Step 5: Solve for x
   x = 65,032,328.86/12,291.10
6. Step 6: Final answer
   x = 5,291.01