Finding the Fourth Proportional to 42,729.76, 64,105.26 and 17,762.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,729.76 : 64,105.26 = 17,762.32 : x
2. Step 2: Convert to fraction form
   42,729.76/64,105.26 = 17,762.32/x
3. Step 3: Cross multiply
   42,729.76x = 64,105.26 × 17,762.32
4. Step 4: Simplify right side
   42,729.76x = 1,138,658,141.80
5. Step 5: Solve for x
   x = 1,138,658,141.80/42,729.76
6. Step 6: Final answer
   x = 26,647.89