Finding the Fourth Proportional to 1,645.89, 2,269.98 and 1,070.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.89 : 2,269.98 = 1,070.79 : x
2. Step 2: Convert to fraction form
   1,645.89/2,269.98 = 1,070.79/x
3. Step 3: Cross multiply
   1,645.89x = 2,269.98 × 1,070.79
4. Step 4: Simplify right side
   1,645.89x = 2,430,671.88
5. Step 5: Solve for x
   x = 2,430,671.88/1,645.89
6. Step 6: Final answer
   x = 1,476.81