Finding the Fourth Proportional to 1,248.56, 1,870.43 and 699.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248.56 : 1,870.43 = 699.07 : x
2. Step 2: Convert to fraction form
   1,248.56/1,870.43 = 699.07/x
3. Step 3: Cross multiply
   1,248.56x = 1,870.43 × 699.07
4. Step 4: Simplify right side
   1,248.56x = 1,307,561.50
5. Step 5: Solve for x
   x = 1,307,561.50/1,248.56
6. Step 6: Final answer
   x = 1,047.26