Finding the Fourth Proportional to 14,212.31, 19,612.50 and 7,839.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,212.31 : 19,612.50 = 7,839.15 : x
2. Step 2: Convert to fraction form
   14,212.31/19,612.50 = 7,839.15/x
3. Step 3: Cross multiply
   14,212.31x = 19,612.50 × 7,839.15
4. Step 4: Simplify right side
   14,212.31x = 153,745,458.05
5. Step 5: Solve for x
   x = 153,745,458.05/14,212.31
6. Step 6: Final answer
   x = 10,817.77