Finding the Fourth Proportional to 9,978.24, 14,904.16 and 7,763.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.24 : 14,904.16 = 7,763.90 : x
2. Step 2: Convert to fraction form
   9,978.24/14,904.16 = 7,763.90/x
3. Step 3: Cross multiply
   9,978.24x = 14,904.16 × 7,763.90
4. Step 4: Simplify right side
   9,978.24x = 115,714,407.82
5. Step 5: Solve for x
   x = 115,714,407.82/9,978.24
6. Step 6: Final answer
   x = 11,596.68