Finding the Fourth Proportional to 1,036.91, 1,430.82 and 617.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.91 : 1,430.82 = 617.21 : x
2. Step 2: Convert to fraction form
   1,036.91/1,430.82 = 617.21/x
3. Step 3: Cross multiply
   1,036.91x = 1,430.82 × 617.21
4. Step 4: Simplify right side
   1,036.91x = 883,111.57
5. Step 5: Solve for x
   x = 883,111.57/1,036.91
6. Step 6: Final answer
   x = 851.67