Finding the Fourth Proportional to 12,978.06, 17,792.92 and 12,741.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978.06 : 17,792.92 = 12,741.60 : x
2. Step 2: Convert to fraction form
   12,978.06/17,792.92 = 12,741.60/x
3. Step 3: Cross multiply
   12,978.06x = 17,792.92 × 12,741.60
4. Step 4: Simplify right side
   12,978.06x = 226,710,237.62
5. Step 5: Solve for x
   x = 226,710,237.62/12,978.06
6. Step 6: Final answer
   x = 17,468.73