Finding the Fourth Proportional to 1,068.31, 1,474.17 and 619.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.31 : 1,474.17 = 619.97 : x
2. Step 2: Convert to fraction form
   1,068.31/1,474.17 = 619.97/x
3. Step 3: Cross multiply
   1,068.31x = 1,474.17 × 619.97
4. Step 4: Simplify right side
   1,068.31x = 913,939.77
5. Step 5: Solve for x
   x = 913,939.77/1,068.31
6. Step 6: Final answer
   x = 855.50