Finding the Fourth Proportional to 1,089.86, 1,504.01 and 697.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.86 : 1,504.01 = 697.30 : x
2. Step 2: Convert to fraction form
   1,089.86/1,504.01 = 697.30/x
3. Step 3: Cross multiply
   1,089.86x = 1,504.01 × 697.30
4. Step 4: Simplify right side
   1,089.86x = 1,048,746.17
5. Step 5: Solve for x
   x = 1,048,746.17/1,089.86
6. Step 6: Final answer
   x = 962.28