Finding the Fourth Proportional to 1,909.89, 2,635.72 and 1,070.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.89 : 2,635.72 = 1,070.60 : x
2. Step 2: Convert to fraction form
   1,909.89/2,635.72 = 1,070.60/x
3. Step 3: Cross multiply
   1,909.89x = 2,635.72 × 1,070.60
4. Step 4: Simplify right side
   1,909.89x = 2,821,785.98
5. Step 5: Solve for x
   x = 2,821,785.98/1,909.89
6. Step 6: Final answer
   x = 1,477.46