Finding the Fourth Proportional to 1,501.31, 2,251.98 and 405.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.31 : 2,251.98 = 405.83 : x
2. Step 2: Convert to fraction form
   1,501.31/2,251.98 = 405.83/x
3. Step 3: Cross multiply
   1,501.31x = 2,251.98 × 405.83
4. Step 4: Simplify right side
   1,501.31x = 913,909.78
5. Step 5: Solve for x
   x = 913,909.78/1,501.31
6. Step 6: Final answer
   x = 608.74