Finding the Fourth Proportional to 1,641.12, 2,264.56 and 942.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.12 : 2,264.56 = 942.72 : x
2. Step 2: Convert to fraction form
   1,641.12/2,264.56 = 942.72/x
3. Step 3: Cross multiply
   1,641.12x = 2,264.56 × 942.72
4. Step 4: Simplify right side
   1,641.12x = 2,134,846.00
5. Step 5: Solve for x
   x = 2,134,846.00/1,641.12
6. Step 6: Final answer
   x = 1,300.85