Finding the Fourth Proportional to 2,047.98, 3,070.48 and 815.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,047.98 : 3,070.48 = 815.02 : x
2. Step 2: Convert to fraction form
   2,047.98/3,070.48 = 815.02/x
3. Step 3: Cross multiply
   2,047.98x = 3,070.48 × 815.02
4. Step 4: Simplify right side
   2,047.98x = 2,502,502.61
5. Step 5: Solve for x
   x = 2,502,502.61/2,047.98
6. Step 6: Final answer
   x = 1,221.94