Finding the Fourth Proportional to 1,062.69, 1,466.54 and 643.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.69 : 1,466.54 = 643.11 : x
2. Step 2: Convert to fraction form
   1,062.69/1,466.54 = 643.11/x
3. Step 3: Cross multiply
   1,062.69x = 1,466.54 × 643.11
4. Step 4: Simplify right side
   1,062.69x = 943,152.61
5. Step 5: Solve for x
   x = 943,152.61/1,062.69
6. Step 6: Final answer
   x = 887.52