Finding the Fourth Proportional to 1,071.31, 1,478.43 and 651.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.31 : 1,478.43 = 651.68 : x
2. Step 2: Convert to fraction form
   1,071.31/1,478.43 = 651.68/x
3. Step 3: Cross multiply
   1,071.31x = 1,478.43 × 651.68
4. Step 4: Simplify right side
   1,071.31x = 963,456.31
5. Step 5: Solve for x
   x = 963,456.31/1,071.31
6. Step 6: Final answer
   x = 899.33