Finding the Fourth Proportional to 1,152.51, 1,726.91 and 690.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.51 : 1,726.91 = 690.07 : x
2. Step 2: Convert to fraction form
   1,152.51/1,726.91 = 690.07/x
3. Step 3: Cross multiply
   1,152.51x = 1,726.91 × 690.07
4. Step 4: Simplify right side
   1,152.51x = 1,191,681.02
5. Step 5: Solve for x
   x = 1,191,681.02/1,152.51
6. Step 6: Final answer
   x = 1,033.99