Finding the Fourth Proportional to 72,490.72, 108,763.74 and 28,148.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,490.72 : 108,763.74 = 28,148.58 : x
2. Step 2: Convert to fraction form
   72,490.72/108,763.74 = 28,148.58/x
3. Step 3: Cross multiply
   72,490.72x = 108,763.74 × 28,148.58
4. Step 4: Simplify right side
   72,490.72x = 3,061,544,836.49
5. Step 5: Solve for x
   x = 3,061,544,836.49/72,490.72
6. Step 6: Final answer
   x = 42,233.61