Finding the Fourth Proportional to 9,978.50, 14,967.83 and 4,430.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.50 : 14,967.83 = 4,430.35 : x
2. Step 2: Convert to fraction form
   9,978.50/14,967.83 = 4,430.35/x
3. Step 3: Cross multiply
   9,978.50x = 14,967.83 × 4,430.35
4. Step 4: Simplify right side
   9,978.50x = 66,312,725.64
5. Step 5: Solve for x
   x = 66,312,725.64/9,978.50
6. Step 6: Final answer
   x = 6,645.56