Finding the Fourth Proportional to 30,758.03, 42,423.15 and 27,312.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,758.03 : 42,423.15 = 27,312.78 : x
2. Step 2: Convert to fraction form
   30,758.03/42,423.15 = 27,312.78/x
3. Step 3: Cross multiply
   30,758.03x = 42,423.15 × 27,312.78
4. Step 4: Simplify right side
   30,758.03x = 1,158,694,162.86
5. Step 5: Solve for x
   x = 1,158,694,162.86/30,758.03
6. Step 6: Final answer
   x = 37,671.28