Finding the Fourth Proportional to 42,721.02, 64,100.16 and 17,767.35

Step by Step Solution

1. Step 1: Write the proportion equation
   42,721.02 : 64,100.16 = 17,767.35 : x
2. Step 2: Convert to fraction form
   42,721.02/64,100.16 = 17,767.35/x
3. Step 3: Cross multiply
   42,721.02x = 64,100.16 × 17,767.35
4. Step 4: Simplify right side
   42,721.02x = 1,138,889,977.78
5. Step 5: Solve for x
   x = 1,138,889,977.78/42,721.02
6. Step 6: Final answer
   x = 26,658.77