Finding the Fourth Proportional to 1,071.17, 1,478.54 and 651.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.17 : 1,478.54 = 651.89 : x
2. Step 2: Convert to fraction form
   1,071.17/1,478.54 = 651.89/x
3. Step 3: Cross multiply
   1,071.17x = 1,478.54 × 651.89
4. Step 4: Simplify right side
   1,071.17x = 963,847.10
5. Step 5: Solve for x
   x = 963,847.10/1,071.17
6. Step 6: Final answer
   x = 899.81