Finding the Fourth Proportional to 1,422.56, 1,961.52 and 1,159.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.56 : 1,961.52 = 1,159.76 : x
2. Step 2: Convert to fraction form
   1,422.56/1,961.52 = 1,159.76/x
3. Step 3: Cross multiply
   1,422.56x = 1,961.52 × 1,159.76
4. Step 4: Simplify right side
   1,422.56x = 2,274,892.44
5. Step 5: Solve for x
   x = 2,274,892.44/1,422.56
6. Step 6: Final answer
   x = 1,599.15