Finding the Fourth Proportional to 72,628.56, 100,209.78 and 42,396.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,628.56 : 100,209.78 = 42,396.72 : x
2. Step 2: Convert to fraction form
   72,628.56/100,209.78 = 42,396.72/x
3. Step 3: Cross multiply
   72,628.56x = 100,209.78 × 42,396.72
4. Step 4: Simplify right side
   72,628.56x = 4,248,565,983.92
5. Step 5: Solve for x
   x = 4,248,565,983.92/72,628.56
6. Step 6: Final answer
   x = 58,497.18