Finding the Fourth Proportional to 2,508.95, 3,758.31 and 1,188.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,508.95 : 3,758.31 = 1,188.70 : x
2. Step 2: Convert to fraction form
   2,508.95/3,758.31 = 1,188.70/x
3. Step 3: Cross multiply
   2,508.95x = 3,758.31 × 1,188.70
4. Step 4: Simplify right side
   2,508.95x = 4,467,498.52
5. Step 5: Solve for x
   x = 4,467,498.52/2,508.95
6. Step 6: Final answer
   x = 1,780.63