Finding the Fourth Proportional to 13,113.32, 19,665.72 and 4,345.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.32 : 19,665.72 = 4,345.88 : x
2. Step 2: Convert to fraction form
   13,113.32/19,665.72 = 4,345.88/x
3. Step 3: Cross multiply
   13,113.32x = 19,665.72 × 4,345.88
4. Step 4: Simplify right side
   13,113.32x = 85,464,760.91
5. Step 5: Solve for x
   x = 85,464,760.91/13,113.32
6. Step 6: Final answer
   x = 6,517.40