Finding the Fourth Proportional to 42,951.72, 64,426.79 and 17,645.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,951.72 : 64,426.79 = 17,645.86 : x
2. Step 2: Convert to fraction form
   42,951.72/64,426.79 = 17,645.86/x
3. Step 3: Cross multiply
   42,951.72x = 64,426.79 × 17,645.86
4. Step 4: Simplify right side
   42,951.72x = 1,136,866,116.59
5. Step 5: Solve for x
   x = 1,136,866,116.59/42,951.72
6. Step 6: Final answer
   x = 26,468.47