Finding the Fourth Proportional to 42,406.14, 58,511.19 and 25,638.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,406.14 : 58,511.19 = 25,638.78 : x
2. Step 2: Convert to fraction form
   42,406.14/58,511.19 = 25,638.78/x
3. Step 3: Cross multiply
   42,406.14x = 58,511.19 × 25,638.78
4. Step 4: Simplify right side
   42,406.14x = 1,500,155,527.95
5. Step 5: Solve for x
   x = 1,500,155,527.95/42,406.14
6. Step 6: Final answer
   x = 35,375.90