Finding the Fourth Proportional to 1,759.83, 2,639.76 and 785.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,759.83 : 2,639.76 = 785.98 : x
2. Step 2: Convert to fraction form
   1,759.83/2,639.76 = 785.98/x
3. Step 3: Cross multiply
   1,759.83x = 2,639.76 × 785.98
4. Step 4: Simplify right side
   1,759.83x = 2,074,798.56
5. Step 5: Solve for x
   x = 2,074,798.56/1,759.83
6. Step 6: Final answer
   x = 1,178.98