Finding the Fourth Proportional to 9,978.32, 14,968.25 and 5,818.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.32 : 14,968.25 = 5,818.75 : x
2. Step 2: Convert to fraction form
   9,978.32/14,968.25 = 5,818.75/x
3. Step 3: Cross multiply
   9,978.32x = 14,968.25 × 5,818.75
4. Step 4: Simplify right side
   9,978.32x = 87,096,481.81
5. Step 5: Solve for x
   x = 87,096,481.81/9,978.32
6. Step 6: Final answer
   x = 8,728.57