Finding the Fourth Proportional to 39,310.91, 58,978.82 and 13,034.10

Step by Step Solution

1. Step 1: Write the proportion equation
   39,310.91 : 58,978.82 = 13,034.10 : x
2. Step 2: Convert to fraction form
   39,310.91/58,978.82 = 13,034.10/x
3. Step 3: Cross multiply
   39,310.91x = 58,978.82 × 13,034.10
4. Step 4: Simplify right side
   39,310.91x = 768,735,837.76
5. Step 5: Solve for x
   x = 768,735,837.76/39,310.91
6. Step 6: Final answer
   x = 19,555.28