Finding the Fourth Proportional to 13,098.52, 18,075.30 and 7,129.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,098.52 : 18,075.30 = 7,129.98 : x
2. Step 2: Convert to fraction form
   13,098.52/18,075.30 = 7,129.98/x
3. Step 3: Cross multiply
   13,098.52x = 18,075.30 × 7,129.98
4. Step 4: Simplify right side
   13,098.52x = 128,876,527.49
5. Step 5: Solve for x
   x = 128,876,527.49/13,098.52
6. Step 6: Final answer
   x = 9,839.01