Finding the Fourth Proportional to 1,627.72, 2,440.42 and 761.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,627.72 : 2,440.42 = 761.56 : x
2. Step 2: Convert to fraction form
   1,627.72/2,440.42 = 761.56/x
3. Step 3: Cross multiply
   1,627.72x = 2,440.42 × 761.56
4. Step 4: Simplify right side
   1,627.72x = 1,858,526.26
5. Step 5: Solve for x
   x = 1,858,526.26/1,627.72
6. Step 6: Final answer
   x = 1,141.80