Finding the Fourth Proportional to 9,870.32, 14,809.57 and 4,320.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.32 : 14,809.57 = 4,320.80 : x
2. Step 2: Convert to fraction form
   9,870.32/14,809.57 = 4,320.80/x
3. Step 3: Cross multiply
   9,870.32x = 14,809.57 × 4,320.80
4. Step 4: Simplify right side
   9,870.32x = 63,989,237.88
5. Step 5: Solve for x
   x = 63,989,237.88/9,870.32
6. Step 6: Final answer
   x = 6,483.00