Finding the Fourth Proportional to 12,690.03, 17,510.52 and 7,380.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.03 : 17,510.52 = 7,380.75 : x
2. Step 2: Convert to fraction form
   12,690.03/17,510.52 = 7,380.75/x
3. Step 3: Cross multiply
   12,690.03x = 17,510.52 × 7,380.75
4. Step 4: Simplify right side
   12,690.03x = 129,240,770.49
5. Step 5: Solve for x
   x = 129,240,770.49/12,690.03
6. Step 6: Final answer
   x = 10,184.43