Finding the Fourth Proportional to 42,811.88, 64,244.55 and 30,805.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,811.88 : 64,244.55 = 30,805.25 : x
2. Step 2: Convert to fraction form
   42,811.88/64,244.55 = 30,805.25/x
3. Step 3: Cross multiply
   42,811.88x = 64,244.55 × 30,805.25
4. Step 4: Simplify right side
   42,811.88x = 1,979,069,423.89
5. Step 5: Solve for x
   x = 1,979,069,423.89/42,811.88
6. Step 6: Final answer
   x = 46,227.11