Finding the Fourth Proportional to 1,152.71, 1,726.80 and 761.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.71 : 1,726.80 = 761.53 : x
2. Step 2: Convert to fraction form
   1,152.71/1,726.80 = 761.53/x
3. Step 3: Cross multiply
   1,152.71x = 1,726.80 × 761.53
4. Step 4: Simplify right side
   1,152.71x = 1,315,001.37
5. Step 5: Solve for x
   x = 1,315,001.37/1,152.71
6. Step 6: Final answer
   x = 1,140.79