Finding the Fourth Proportional to 72,056.48, 99,436.29 and 40,228.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,056.48 : 99,436.29 = 40,228.34 : x
2. Step 2: Convert to fraction form
   72,056.48/99,436.29 = 40,228.34/x
3. Step 3: Cross multiply
   72,056.48x = 99,436.29 × 40,228.34
4. Step 4: Simplify right side
   72,056.48x = 4,000,156,882.46
5. Step 5: Solve for x
   x = 4,000,156,882.46/72,056.48
6. Step 6: Final answer
   x = 55,514.19