Finding the Fourth Proportional to 1,047.72, 1,445.34 and 698.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.72 : 1,445.34 = 698.88 : x
2. Step 2: Convert to fraction form
   1,047.72/1,445.34 = 698.88/x
3. Step 3: Cross multiply
   1,047.72x = 1,445.34 × 698.88
4. Step 4: Simplify right side
   1,047.72x = 1,010,119.22
5. Step 5: Solve for x
   x = 1,010,119.22/1,047.72
6. Step 6: Final answer
   x = 964.11