Finding the Fourth Proportional to 1,572.30, 2,356.15 and 694.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.30 : 2,356.15 = 694.01 : x
2. Step 2: Convert to fraction form
   1,572.30/2,356.15 = 694.01/x
3. Step 3: Cross multiply
   1,572.30x = 2,356.15 × 694.01
4. Step 4: Simplify right side
   1,572.30x = 1,635,196.44
5. Step 5: Solve for x
   x = 1,635,196.44/1,572.30
6. Step 6: Final answer
   x = 1,040.00