Finding the Fourth Proportional to 42,963.30, 64,412.55 and 28,175.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,963.30 : 64,412.55 = 28,175.94 : x
2. Step 2: Convert to fraction form
   42,963.30/64,412.55 = 28,175.94/x
3. Step 3: Cross multiply
   42,963.30x = 64,412.55 × 28,175.94
4. Step 4: Simplify right side
   42,963.30x = 1,814,884,144.05
5. Step 5: Solve for x
   x = 1,814,884,144.05/42,963.30
6. Step 6: Final answer
   x = 42,242.66