Finding the Fourth Proportional to 1,133.61, 1,699.33 and 620.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,133.61 : 1,699.33 = 620.25 : x
2. Step 2: Convert to fraction form
   1,133.61/1,699.33 = 620.25/x
3. Step 3: Cross multiply
   1,133.61x = 1,699.33 × 620.25
4. Step 4: Simplify right side
   1,133.61x = 1,054,006.33
5. Step 5: Solve for x
   x = 1,054,006.33/1,133.61
6. Step 6: Final answer
   x = 929.78