Finding the Fourth Proportional to 42,185.71, 58,217.20 and 25,186.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,185.71 : 58,217.20 = 25,186.78 : x
2. Step 2: Convert to fraction form
   42,185.71/58,217.20 = 25,186.78/x
3. Step 3: Cross multiply
   42,185.71x = 58,217.20 × 25,186.78
4. Step 4: Simplify right side
   42,185.71x = 1,466,303,682.68
5. Step 5: Solve for x
   x = 1,466,303,682.68/42,185.71
6. Step 6: Final answer
   x = 34,758.31