Finding the Fourth Proportional to 9,818.21, 14,719.05 and 3,978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,818.21 : 14,719.05 = 3,978.92 : x
2. Step 2: Convert to fraction form
   9,818.21/14,719.05 = 3,978.92/x
3. Step 3: Cross multiply
   9,818.21x = 14,719.05 × 3,978.92
4. Step 4: Simplify right side
   9,818.21x = 58,565,959.22
5. Step 5: Solve for x
   x = 58,565,959.22/9,818.21
6. Step 6: Final answer
   x = 5,965.03