Finding the Fourth Proportional to 13,429.01, 18,531.10 and 7,759.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.01 : 18,531.10 = 7,759.31 : x
2. Step 2: Convert to fraction form
   13,429.01/18,531.10 = 7,759.31/x
3. Step 3: Cross multiply
   13,429.01x = 18,531.10 × 7,759.31
4. Step 4: Simplify right side
   13,429.01x = 143,788,510.74
5. Step 5: Solve for x
   x = 143,788,510.74/13,429.01
6. Step 6: Final answer
   x = 10,707.31