Finding the Fourth Proportional to 1,051.91, 1,451.60 and 609.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.91 : 1,451.60 = 609.89 : x
2. Step 2: Convert to fraction form
   1,051.91/1,451.60 = 609.89/x
3. Step 3: Cross multiply
   1,051.91x = 1,451.60 × 609.89
4. Step 4: Simplify right side
   1,051.91x = 885,306.02
5. Step 5: Solve for x
   x = 885,306.02/1,051.91
6. Step 6: Final answer
   x = 841.62