Finding the Fourth Proportional to 1,054.02, 1,454.34 and 661.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.02 : 1,454.34 = 661.59 : x
2. Step 2: Convert to fraction form
   1,054.02/1,454.34 = 661.59/x
3. Step 3: Cross multiply
   1,054.02x = 1,454.34 × 661.59
4. Step 4: Simplify right side
   1,054.02x = 962,176.80
5. Step 5: Solve for x
   x = 962,176.80/1,054.02
6. Step 6: Final answer
   x = 912.86