Finding the Fourth Proportional to 42,736.38, 64,117.53 and 30,280.47

Step by Step Solution

1. Step 1: Write the proportion equation
   42,736.38 : 64,117.53 = 30,280.47 : x
2. Step 2: Convert to fraction form
   42,736.38/64,117.53 = 30,280.47/x
3. Step 3: Cross multiply
   42,736.38x = 64,117.53 × 30,280.47
4. Step 4: Simplify right side
   42,736.38x = 1,941,508,943.64
5. Step 5: Solve for x
   x = 1,941,508,943.64/42,736.38
6. Step 6: Final answer
   x = 45,429.89