Finding the Fourth Proportional to 13,293.88, 19,937.18 and 3,931.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,293.88 : 19,937.18 = 3,931.10 : x
2. Step 2: Convert to fraction form
   13,293.88/19,937.18 = 3,931.10/x
3. Step 3: Cross multiply
   13,293.88x = 19,937.18 × 3,931.10
4. Step 4: Simplify right side
   13,293.88x = 78,375,048.30
5. Step 5: Solve for x
   x = 78,375,048.30/13,293.88
6. Step 6: Final answer
   x = 5,895.57