Finding the Fourth Proportional to 109,509.82, 164,266.05 and 42,981.28

Step by Step Solution

1. Step 1: Write the proportion equation
   109,509.82 : 164,266.05 = 42,981.28 : x
2. Step 2: Convert to fraction form
   109,509.82/164,266.05 = 42,981.28/x
3. Step 3: Cross multiply
   109,509.82x = 164,266.05 × 42,981.28
4. Step 4: Simplify right side
   109,509.82x = 7,060,365,089.54
5. Step 5: Solve for x
   x = 7,060,365,089.54/109,509.82
6. Step 6: Final answer
   x = 64,472.44