Finding the Fourth Proportional to 1,071.12, 1,478.32 and 651.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.12 : 1,478.32 = 651.72 : x
2. Step 2: Convert to fraction form
   1,071.12/1,478.32 = 651.72/x
3. Step 3: Cross multiply
   1,071.12x = 1,478.32 × 651.72
4. Step 4: Simplify right side
   1,071.12x = 963,450.71
5. Step 5: Solve for x
   x = 963,450.71/1,071.12
6. Step 6: Final answer
   x = 899.48