Finding the Fourth Proportional to 1,780.17, 2,669.12 and 740.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.17 : 2,669.12 = 740.89 : x
2. Step 2: Convert to fraction form
   1,780.17/2,669.12 = 740.89/x
3. Step 3: Cross multiply
   1,780.17x = 2,669.12 × 740.89
4. Step 4: Simplify right side
   1,780.17x = 1,977,513.94
5. Step 5: Solve for x
   x = 1,977,513.94/1,780.17
6. Step 6: Final answer
   x = 1,110.86