Finding the Fourth Proportional to 12,942.32, 19,432.91 and 7,401.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942.32 : 19,432.91 = 7,401.92 : x
2. Step 2: Convert to fraction form
   12,942.32/19,432.91 = 7,401.92/x
3. Step 3: Cross multiply
   12,942.32x = 19,432.91 × 7,401.92
4. Step 4: Simplify right side
   12,942.32x = 143,840,766.53
5. Step 5: Solve for x
   x = 143,840,766.53/12,942.32
6. Step 6: Final answer
   x = 11,113.99