Finding the Fourth Proportional to 1,502.78, 2,073.47 and 905.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,502.78 : 2,073.47 = 905.00 : x
2. Step 2: Convert to fraction form
   1,502.78/2,073.47 = 905.00/x
3. Step 3: Cross multiply
   1,502.78x = 2,073.47 × 905.00
4. Step 4: Simplify right side
   1,502.78x = 1,876,475.46
5. Step 5: Solve for x
   x = 1,876,475.46/1,502.78
6. Step 6: Final answer
   x = 1,248.67