Finding the Fourth Proportional to 72,990.38, 100,736.39 and 42,787.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,990.38 : 100,736.39 = 42,787.58 : x
2. Step 2: Convert to fraction form
   72,990.38/100,736.39 = 42,787.58/x
3. Step 3: Cross multiply
   72,990.38x = 100,736.39 × 42,787.58
4. Step 4: Simplify right side
   72,990.38x = 4,310,265,949.32
5. Step 5: Solve for x
   x = 4,310,265,949.32/72,990.38
6. Step 6: Final answer
   x = 59,052.52