Finding the Fourth Proportional to 1,309.01, 1,962.72 and 615.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.01 : 1,962.72 = 615.83 : x
2. Step 2: Convert to fraction form
   1,309.01/1,962.72 = 615.83/x
3. Step 3: Cross multiply
   1,309.01x = 1,962.72 × 615.83
4. Step 4: Simplify right side
   1,309.01x = 1,208,701.86
5. Step 5: Solve for x
   x = 1,208,701.86/1,309.01
6. Step 6: Final answer
   x = 923.37