Finding the Fourth Proportional to 72,871.49, 109,278.60 and 35,420.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,871.49 : 109,278.60 = 35,420.60 : x
2. Step 2: Convert to fraction form
   72,871.49/109,278.60 = 35,420.60/x
3. Step 3: Cross multiply
   72,871.49x = 109,278.60 × 35,420.60
4. Step 4: Simplify right side
   72,871.49x = 3,870,713,032.77
5. Step 5: Solve for x
   x = 3,870,713,032.77/72,871.49
6. Step 6: Final answer
   x = 53,116.98