Finding the Fourth Proportional to 12,419.53, 18,620.18 and 5,842.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,419.53 : 18,620.18 = 5,842.13 : x
2. Step 2: Convert to fraction form
   12,419.53/18,620.18 = 5,842.13/x
3. Step 3: Cross multiply
   12,419.53x = 18,620.18 × 5,842.13
4. Step 4: Simplify right side
   12,419.53x = 108,781,411.78
5. Step 5: Solve for x
   x = 108,781,411.78/12,419.53
6. Step 6: Final answer
   x = 8,758.90