Finding the Fourth Proportional to 11,700.30, 17,551.35 and 3,909.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,700.30 : 17,551.35 = 3,909.12 : x
2. Step 2: Convert to fraction form
   11,700.30/17,551.35 = 3,909.12/x
3. Step 3: Cross multiply
   11,700.30x = 17,551.35 × 3,909.12
4. Step 4: Simplify right side
   11,700.30x = 68,610,333.31
5. Step 5: Solve for x
   x = 68,610,333.31/11,700.30
6. Step 6: Final answer
   x = 5,863.98