Finding the Fourth Proportional to 42,698.27, 64,047.60 and 17,738.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,698.27 : 64,047.60 = 17,738.30 : x
2. Step 2: Convert to fraction form
   42,698.27/64,047.60 = 17,738.30/x
3. Step 3: Cross multiply
   42,698.27x = 64,047.60 × 17,738.30
4. Step 4: Simplify right side
   42,698.27x = 1,136,095,454.39
5. Step 5: Solve for x
   x = 1,136,095,454.39/42,698.27
6. Step 6: Final answer
   x = 26,607.53