Finding the Fourth Proportional to 13,139.16, 19,711.52 and 3,779.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139.16 : 19,711.52 = 3,779.08 : x
2. Step 2: Convert to fraction form
   13,139.16/19,711.52 = 3,779.08/x
3. Step 3: Cross multiply
   13,139.16x = 19,711.52 × 3,779.08
4. Step 4: Simplify right side
   13,139.16x = 74,491,411.00
5. Step 5: Solve for x
   x = 74,491,411.00/13,139.16
6. Step 6: Final answer
   x = 5,669.42