Finding the Fourth Proportional to 1,602.33, 2,404.18 and 780.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,602.33 : 2,404.18 = 780.61 : x
2. Step 2: Convert to fraction form
   1,602.33/2,404.18 = 780.61/x
3. Step 3: Cross multiply
   1,602.33x = 2,404.18 × 780.61
4. Step 4: Simplify right side
   1,602.33x = 1,876,733.18
5. Step 5: Solve for x
   x = 1,876,733.18/1,602.33
6. Step 6: Final answer
   x = 1,171.25