Finding the Fourth Proportional to 1,314.56, 1,970.10 and 698.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.56 : 1,970.10 = 698.72 : x
2. Step 2: Convert to fraction form
   1,314.56/1,970.10 = 698.72/x
3. Step 3: Cross multiply
   1,314.56x = 1,970.10 × 698.72
4. Step 4: Simplify right side
   1,314.56x = 1,376,548.27
5. Step 5: Solve for x
   x = 1,376,548.27/1,314.56
6. Step 6: Final answer
   x = 1,047.16