Finding the Fourth Proportional to 72,406.80, 99,924.12 and 42,211.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.80 : 99,924.12 = 42,211.56 : x
2. Step 2: Convert to fraction form
   72,406.80/99,924.12 = 42,211.56/x
3. Step 3: Cross multiply
   72,406.80x = 99,924.12 × 42,211.56
4. Step 4: Simplify right side
   72,406.80x = 4,217,952,986.83
5. Step 5: Solve for x
   x = 4,217,952,986.83/72,406.80
6. Step 6: Final answer
   x = 58,253.55