Finding the Fourth Proportional to 13,025.71, 19,543.25 and 5,123.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,025.71 : 19,543.25 = 5,123.85 : x
2. Step 2: Convert to fraction form
   13,025.71/19,543.25 = 5,123.85/x
3. Step 3: Cross multiply
   13,025.71x = 19,543.25 × 5,123.85
4. Step 4: Simplify right side
   13,025.71x = 100,136,681.51
5. Step 5: Solve for x
   x = 100,136,681.51/13,025.71
6. Step 6: Final answer
   x = 7,687.62