Finding the Fourth Proportional to 1,055.07, 1,581.98 and 507.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.07 : 1,581.98 = 507.42 : x
2. Step 2: Convert to fraction form
   1,055.07/1,581.98 = 507.42/x
3. Step 3: Cross multiply
   1,055.07x = 1,581.98 × 507.42
4. Step 4: Simplify right side
   1,055.07x = 802,725.75
5. Step 5: Solve for x
   x = 802,725.75/1,055.07
6. Step 6: Final answer
   x = 760.83