Finding the Fourth Proportional to 14,128.53, 19,497.90 and 7,842.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,128.53 : 19,497.90 = 7,842.12 : x
2. Step 2: Convert to fraction form
   14,128.53/19,497.90 = 7,842.12/x
3. Step 3: Cross multiply
   14,128.53x = 19,497.90 × 7,842.12
4. Step 4: Simplify right side
   14,128.53x = 152,904,871.55
5. Step 5: Solve for x
   x = 152,904,871.55/14,128.53
6. Step 6: Final answer
   x = 10,822.42