Finding the Fourth Proportional to 1,051.98, 1,451.34 and 609.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.98 : 1,451.34 = 609.81 : x
2. Step 2: Convert to fraction form
   1,051.98/1,451.34 = 609.81/x
3. Step 3: Cross multiply
   1,051.98x = 1,451.34 × 609.81
4. Step 4: Simplify right side
   1,051.98x = 885,041.65
5. Step 5: Solve for x
   x = 885,041.65/1,051.98
6. Step 6: Final answer
   x = 841.31