Finding the Fourth Proportional to 72,961.68, 109,443.60 and 48,160.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,961.68 : 109,443.60 = 48,160.56 : x
2. Step 2: Convert to fraction form
   72,961.68/109,443.60 = 48,160.56/x
3. Step 3: Cross multiply
   72,961.68x = 109,443.60 × 48,160.56
4. Step 4: Simplify right side
   72,961.68x = 5,270,865,064.42
5. Step 5: Solve for x
   x = 5,270,865,064.42/72,961.68
6. Step 6: Final answer
   x = 72,241.55