Finding the Fourth Proportional to 72,178.58, 99,606.15 and 40,347.46

Step by Step Solution

1. Step 1: Write the proportion equation
   72,178.58 : 99,606.15 = 40,347.46 : x
2. Step 2: Convert to fraction form
   72,178.58/99,606.15 = 40,347.46/x
3. Step 3: Cross multiply
   72,178.58x = 99,606.15 × 40,347.46
4. Step 4: Simplify right side
   72,178.58x = 4,018,855,152.88
5. Step 5: Solve for x
   x = 4,018,855,152.88/72,178.58
6. Step 6: Final answer
   x = 55,679.33