Finding the Fourth Proportional to 21,080.00, 31,618.58 and 9,995.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,080.00 : 31,618.58 = 9,995.55 : x
2. Step 2: Convert to fraction form
   21,080.00/31,618.58 = 9,995.55/x
3. Step 3: Cross multiply
   21,080.00x = 31,618.58 × 9,995.55
4. Step 4: Simplify right side
   21,080.00x = 316,045,047.34
5. Step 5: Solve for x
   x = 316,045,047.34/21,080.00
6. Step 6: Final answer
   x = 14,992.65