Finding the Fourth Proportional to 9,871.06, 14,810.70 and 4,321.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,871.06 : 14,810.70 = 4,321.55 : x
2. Step 2: Convert to fraction form
   9,871.06/14,810.70 = 4,321.55/x
3. Step 3: Cross multiply
   9,871.06x = 14,810.70 × 4,321.55
4. Step 4: Simplify right side
   9,871.06x = 64,005,180.59
5. Step 5: Solve for x
   x = 64,005,180.59/9,871.06
6. Step 6: Final answer
   x = 6,484.12