Finding the Fourth Proportional to 1,005.02, 1,507.59 and 571.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,005.02 : 1,507.59 = 571.34 : x
2. Step 2: Convert to fraction form
   1,005.02/1,507.59 = 571.34/x
3. Step 3: Cross multiply
   1,005.02x = 1,507.59 × 571.34
4. Step 4: Simplify right side
   1,005.02x = 861,346.47
5. Step 5: Solve for x
   x = 861,346.47/1,005.02
6. Step 6: Final answer
   x = 857.04