Finding the Fourth Proportional to 58,540.78, 87,819.72 and 19,088.20

Step by Step Solution

1. Step 1: Write the proportion equation
   58,540.78 : 87,819.72 = 19,088.20 : x
2. Step 2: Convert to fraction form
   58,540.78/87,819.72 = 19,088.20/x
3. Step 3: Cross multiply
   58,540.78x = 87,819.72 × 19,088.20
4. Step 4: Simplify right side
   58,540.78x = 1,676,320,379.30
5. Step 5: Solve for x
   x = 1,676,320,379.30/58,540.78
6. Step 6: Final answer
   x = 28,635.09