Finding the Fourth Proportional to 1,061.64, 1,464.82 and 921.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.64 : 1,464.82 = 921.51 : x
2. Step 2: Convert to fraction form
   1,061.64/1,464.82 = 921.51/x
3. Step 3: Cross multiply
   1,061.64x = 1,464.82 × 921.51
4. Step 4: Simplify right side
   1,061.64x = 1,349,843.97
5. Step 5: Solve for x
   x = 1,349,843.97/1,061.64
6. Step 6: Final answer
   x = 1,271.47