Finding the Fourth Proportional to 8,978.96, 12,392.12 and 5,152.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.96 : 12,392.12 = 5,152.08 : x
2. Step 2: Convert to fraction form
   8,978.96/12,392.12 = 5,152.08/x
3. Step 3: Cross multiply
   8,978.96x = 12,392.12 × 5,152.08
4. Step 4: Simplify right side
   8,978.96x = 63,845,193.61
5. Step 5: Solve for x
   x = 63,845,193.61/8,978.96
6. Step 6: Final answer
   x = 7,110.53