Finding the Fourth Proportional to 42,665.74, 64,021.02 and 30,265.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.74 : 64,021.02 = 30,265.72 : x
2. Step 2: Convert to fraction form
   42,665.74/64,021.02 = 30,265.72/x
3. Step 3: Cross multiply
   42,665.74x = 64,021.02 × 30,265.72
4. Step 4: Simplify right side
   42,665.74x = 1,937,642,265.43
5. Step 5: Solve for x
   x = 1,937,642,265.43/42,665.74
6. Step 6: Final answer
   x = 45,414.48