Finding the Fourth Proportional to 42,784.26, 64,187.34 and 17,816.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,784.26 : 64,187.34 = 17,816.04 : x
2. Step 2: Convert to fraction form
   42,784.26/64,187.34 = 17,816.04/x
3. Step 3: Cross multiply
   42,784.26x = 64,187.34 × 17,816.04
4. Step 4: Simplify right side
   42,784.26x = 1,143,564,216.93
5. Step 5: Solve for x
   x = 1,143,564,216.93/42,784.26
6. Step 6: Final answer
   x = 26,728.62