Finding the Fourth Proportional to 9,970.55, 14,978.10 and 8,330.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,970.55 : 14,978.10 = 8,330.30 : x
2. Step 2: Convert to fraction form
   9,970.55/14,978.10 = 8,330.30/x
3. Step 3: Cross multiply
   9,970.55x = 14,978.10 × 8,330.30
4. Step 4: Simplify right side
   9,970.55x = 124,772,066.43
5. Step 5: Solve for x
   x = 124,772,066.43/9,970.55
6. Step 6: Final answer
   x = 12,514.06