Finding the Fourth Proportional to 9,978.98, 14,972.00 and 4,431.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.98 : 14,972.00 = 4,431.83 : x
2. Step 2: Convert to fraction form
   9,978.98/14,972.00 = 4,431.83/x
3. Step 3: Cross multiply
   9,978.98x = 14,972.00 × 4,431.83
4. Step 4: Simplify right side
   9,978.98x = 66,353,261.74
5. Step 5: Solve for x
   x = 66,353,261.74/9,978.98
6. Step 6: Final answer
   x = 6,649.31