Finding the Fourth Proportional to 1,913.34, 2,870.28 and 758.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.34 : 2,870.28 = 758.82 : x
2. Step 2: Convert to fraction form
   1,913.34/2,870.28 = 758.82/x
3. Step 3: Cross multiply
   1,913.34x = 2,870.28 × 758.82
4. Step 4: Simplify right side
   1,913.34x = 2,178,025.87
5. Step 5: Solve for x
   x = 2,178,025.87/1,913.34
6. Step 6: Final answer
   x = 1,138.34