Finding the Fourth Proportional to 1,066.86, 1,472.34 and 647.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.86 : 1,472.34 = 647.23 : x
2. Step 2: Convert to fraction form
   1,066.86/1,472.34 = 647.23/x
3. Step 3: Cross multiply
   1,066.86x = 1,472.34 × 647.23
4. Step 4: Simplify right side
   1,066.86x = 952,938.94
5. Step 5: Solve for x
   x = 952,938.94/1,066.86
6. Step 6: Final answer
   x = 893.22