Finding the Fourth Proportional to 8,978.25, 13,456.13 and 4,807.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.25 : 13,456.13 = 4,807.92 : x
2. Step 2: Convert to fraction form
   8,978.25/13,456.13 = 4,807.92/x
3. Step 3: Cross multiply
   8,978.25x = 13,456.13 × 4,807.92
4. Step 4: Simplify right side
   8,978.25x = 64,695,972.51
5. Step 5: Solve for x
   x = 64,695,972.51/8,978.25
6. Step 6: Final answer
   x = 7,205.86