Finding the Fourth Proportional to 1,769.58, 2,653.56 and 1,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,769.58 : 2,653.56 = 1,039.50 : x
2. Step 2: Convert to fraction form
   1,769.58/2,653.56 = 1,039.50/x
3. Step 3: Cross multiply
   1,769.58x = 2,653.56 × 1,039.50
4. Step 4: Simplify right side
   1,769.58x = 2,758,375.62
5. Step 5: Solve for x
   x = 2,758,375.62/1,769.58
6. Step 6: Final answer
   x = 1,558.77