Finding the Fourth Proportional to 12,150.40, 18,218.74 and 5,030.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150.40 : 18,218.74 = 5,030.62 : x
2. Step 2: Convert to fraction form
   12,150.40/18,218.74 = 5,030.62/x
3. Step 3: Cross multiply
   12,150.40x = 18,218.74 × 5,030.62
4. Step 4: Simplify right side
   12,150.40x = 91,651,557.82
5. Step 5: Solve for x
   x = 91,651,557.82/12,150.40
6. Step 6: Final answer
   x = 7,543.09