Finding the Fourth Proportional to 78,420.69, 117,564.89 and 34,013.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,420.69 : 117,564.89 = 34,013.99 : x
2. Step 2: Convert to fraction form
   78,420.69/117,564.89 = 34,013.99/x
3. Step 3: Cross multiply
   78,420.69x = 117,564.89 × 34,013.99
4. Step 4: Simplify right side
   78,420.69x = 3,998,850,992.81
5. Step 5: Solve for x
   x = 3,998,850,992.81/78,420.69
6. Step 6: Final answer
   x = 50,992.30