Finding the Fourth Proportional to 1,061.01, 1,464.02 and 641.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.01 : 1,464.02 = 641.43 : x
2. Step 2: Convert to fraction form
   1,061.01/1,464.02 = 641.43/x
3. Step 3: Cross multiply
   1,061.01x = 1,464.02 × 641.43
4. Step 4: Simplify right side
   1,061.01x = 939,066.80
5. Step 5: Solve for x
   x = 939,066.80/1,061.01
6. Step 6: Final answer
   x = 885.07