Finding the Fourth Proportional to 12,390.04, 17,099.61 and 7,355.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.04 : 17,099.61 = 7,355.50 : x
2. Step 2: Convert to fraction form
   12,390.04/17,099.61 = 7,355.50/x
3. Step 3: Cross multiply
   12,390.04x = 17,099.61 × 7,355.50
4. Step 4: Simplify right side
   12,390.04x = 125,776,086.98
5. Step 5: Solve for x
   x = 125,776,086.98/12,390.04
6. Step 6: Final answer
   x = 10,151.39