Finding the Fourth Proportional to 34,978.72, 52,454.16 and 12,787.04

Step by Step Solution

1. Step 1: Write the proportion equation
   34,978.72 : 52,454.16 = 12,787.04 : x
2. Step 2: Convert to fraction form
   34,978.72/52,454.16 = 12,787.04/x
3. Step 3: Cross multiply
   34,978.72x = 52,454.16 × 12,787.04
4. Step 4: Simplify right side
   34,978.72x = 670,733,442.09
5. Step 5: Solve for x
   x = 670,733,442.09/34,978.72
6. Step 6: Final answer
   x = 19,175.47