Finding the Fourth Proportional to 78,419.20, 117,562.67 and 34,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,419.20 : 117,562.67 = 34,012.50 : x
2. Step 2: Convert to fraction form
   78,419.20/117,562.67 = 34,012.50/x
3. Step 3: Cross multiply
   78,419.20x = 117,562.67 × 34,012.50
4. Step 4: Simplify right side
   78,419.20x = 3,998,600,143.31
5. Step 5: Solve for x
   x = 3,998,600,143.31/78,419.20
6. Step 6: Final answer
   x = 50,990.07