Finding the Fourth Proportional to 42,772.02, 64,112.92 and 17,786.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,772.02 : 64,112.92 = 17,786.91 : x
2. Step 2: Convert to fraction form
   42,772.02/64,112.92 = 17,786.91/x
3. Step 3: Cross multiply
   42,772.02x = 64,112.92 × 17,786.91
4. Step 4: Simplify right side
   42,772.02x = 1,140,370,737.88
5. Step 5: Solve for x
   x = 1,140,370,737.88/42,772.02
6. Step 6: Final answer
   x = 26,661.61