Finding the Fourth Proportional to 38,978.50, 58,412.67 and 19,229.62

Step by Step Solution

1. Step 1: Write the proportion equation
   38,978.50 : 58,412.67 = 19,229.62 : x
2. Step 2: Convert to fraction form
   38,978.50/58,412.67 = 19,229.62/x
3. Step 3: Cross multiply
   38,978.50x = 58,412.67 × 19,229.62
4. Step 4: Simplify right side
   38,978.50x = 1,123,253,447.29
5. Step 5: Solve for x
   x = 1,123,253,447.29/38,978.50
6. Step 6: Final answer
   x = 28,817.26