Finding the Fourth Proportional to 1,759.86, 2,428.29 and 1,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,759.86 : 2,428.29 = 1,138.50 : x
2. Step 2: Convert to fraction form
   1,759.86/2,428.29 = 1,138.50/x
3. Step 3: Cross multiply
   1,759.86x = 2,428.29 × 1,138.50
4. Step 4: Simplify right side
   1,759.86x = 2,764,608.17
5. Step 5: Solve for x
   x = 2,764,608.17/1,759.86
6. Step 6: Final answer
   x = 1,570.93