Finding the Fourth Proportional to 42,758.18, 64,067.15 and 30,216.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,758.18 : 64,067.15 = 30,216.95 : x
2. Step 2: Convert to fraction form
   42,758.18/64,067.15 = 30,216.95/x
3. Step 3: Cross multiply
   42,758.18x = 64,067.15 × 30,216.95
4. Step 4: Simplify right side
   42,758.18x = 1,935,913,863.65
5. Step 5: Solve for x
   x = 1,935,913,863.65/42,758.18
6. Step 6: Final answer
   x = 45,275.87