Finding the Fourth Proportional to 12,139.93, 18,212.03 and 5,024.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.93 : 18,212.03 = 5,024.15 : x
2. Step 2: Convert to fraction form
   12,139.93/18,212.03 = 5,024.15/x
3. Step 3: Cross multiply
   12,139.93x = 18,212.03 × 5,024.15
4. Step 4: Simplify right side
   12,139.93x = 91,499,970.52
5. Step 5: Solve for x
   x = 91,499,970.52/12,139.93
6. Step 6: Final answer
   x = 7,537.11