Finding the Fourth Proportional to 12,402.04, 18,605.80 and 4,081.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.04 : 18,605.80 = 4,081.72 : x
2. Step 2: Convert to fraction form
   12,402.04/18,605.80 = 4,081.72/x
3. Step 3: Cross multiply
   12,402.04x = 18,605.80 × 4,081.72
4. Step 4: Simplify right side
   12,402.04x = 75,943,665.98
5. Step 5: Solve for x
   x = 75,943,665.98/12,402.04
6. Step 6: Final answer
   x = 6,123.48