Finding the Fourth Proportional to 1,064.52, 1,469.78 and 666.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.52 : 1,469.78 = 666.34 : x
2. Step 2: Convert to fraction form
   1,064.52/1,469.78 = 666.34/x
3. Step 3: Cross multiply
   1,064.52x = 1,469.78 × 666.34
4. Step 4: Simplify right side
   1,064.52x = 979,373.21
5. Step 5: Solve for x
   x = 979,373.21/1,064.52
6. Step 6: Final answer
   x = 920.01