Finding the Fourth Proportional to 14,213.31, 19,613.88 and 7,840.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,213.31 : 19,613.88 = 7,840.15 : x
2. Step 2: Convert to fraction form
   14,213.31/19,613.88 = 7,840.15/x
3. Step 3: Cross multiply
   14,213.31x = 19,613.88 × 7,840.15
4. Step 4: Simplify right side
   14,213.31x = 153,775,761.28
5. Step 5: Solve for x
   x = 153,775,761.28/14,213.31
6. Step 6: Final answer
   x = 10,819.14