Finding the Fourth Proportional to 42,936.89, 64,415.55 and 17,962.97

Step by Step Solution

1. Step 1: Write the proportion equation
   42,936.89 : 64,415.55 = 17,962.97 : x
2. Step 2: Convert to fraction form
   42,936.89/64,415.55 = 17,962.97/x
3. Step 3: Cross multiply
   42,936.89x = 64,415.55 × 17,962.97
4. Step 4: Simplify right side
   42,936.89x = 1,157,094,337.47
5. Step 5: Solve for x
   x = 1,157,094,337.47/42,936.89
6. Step 6: Final answer
   x = 26,948.73