Finding the Fourth Proportional to 13,138.83, 19,707.89 and 4,373.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,138.83 : 19,707.89 = 4,373.91 : x
2. Step 2: Convert to fraction form
   13,138.83/19,707.89 = 4,373.91/x
3. Step 3: Cross multiply
   13,138.83x = 19,707.89 × 4,373.91
4. Step 4: Simplify right side
   13,138.83x = 86,200,515.28
5. Step 5: Solve for x
   x = 86,200,515.28/13,138.83
6. Step 6: Final answer
   x = 6,560.75