Finding the Fourth Proportional to 42,486.50, 58,645.96 and 25,719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,486.50 : 58,645.96 = 25,719.50 : x
2. Step 2: Convert to fraction form
   42,486.50/58,645.96 = 25,719.50/x
3. Step 3: Cross multiply
   42,486.50x = 58,645.96 × 25,719.50
4. Step 4: Simplify right side
   42,486.50x = 1,508,344,768.22
5. Step 5: Solve for x
   x = 1,508,344,768.22/42,486.50
6. Step 6: Final answer
   x = 35,501.74