Finding the Fourth Proportional to 72,446.24, 99,978.40 and 42,226.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,446.24 : 99,978.40 = 42,226.69 : x
2. Step 2: Convert to fraction form
   72,446.24/99,978.40 = 42,226.69/x
3. Step 3: Cross multiply
   72,446.24x = 99,978.40 × 42,226.69
4. Step 4: Simplify right side
   72,446.24x = 4,221,756,903.50
5. Step 5: Solve for x
   x = 4,221,756,903.50/72,446.24
6. Step 6: Final answer
   x = 58,274.34