Finding the Fourth Proportional to 14,166.54, 19,549.50 and 7,878.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,166.54 : 19,549.50 = 7,878.78 : x
2. Step 2: Convert to fraction form
   14,166.54/19,549.50 = 7,878.78/x
3. Step 3: Cross multiply
   14,166.54x = 19,549.50 × 7,878.78
4. Step 4: Simplify right side
   14,166.54x = 154,026,209.61
5. Step 5: Solve for x
   x = 154,026,209.61/14,166.54
6. Step 6: Final answer
   x = 10,872.54