Finding the Fourth Proportional to 1,801.56, 2,702.71 and 761.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.56 : 2,702.71 = 761.57 : x
2. Step 2: Convert to fraction form
   1,801.56/2,702.71 = 761.57/x
3. Step 3: Cross multiply
   1,801.56x = 2,702.71 × 761.57
4. Step 4: Simplify right side
   1,801.56x = 2,058,300.43
5. Step 5: Solve for x
   x = 2,058,300.43/1,801.56
6. Step 6: Final answer
   x = 1,142.51