Finding the Fourth Proportional to 42,790.41, 64,158.28 and 17,847.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,790.41 : 64,158.28 = 17,847.68 : x
2. Step 2: Convert to fraction form
   42,790.41/64,158.28 = 17,847.68/x
3. Step 3: Cross multiply
   42,790.41x = 64,158.28 × 17,847.68
4. Step 4: Simplify right side
   42,790.41x = 1,145,076,085.38
5. Step 5: Solve for x
   x = 1,145,076,085.38/42,790.41
6. Step 6: Final answer
   x = 26,760.11