Finding the Fourth Proportional to 1,061.51, 1,464.89 and 663.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.51 : 1,464.89 = 663.39 : x
2. Step 2: Convert to fraction form
   1,061.51/1,464.89 = 663.39/x
3. Step 3: Cross multiply
   1,061.51x = 1,464.89 × 663.39
4. Step 4: Simplify right side
   1,061.51x = 971,790.06
5. Step 5: Solve for x
   x = 971,790.06/1,061.51
6. Step 6: Final answer
   x = 915.48