Finding the Fourth Proportional to 78,890.69, 118,262.91 and 31,494.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,890.69 : 118,262.91 = 31,494.30 : x
2. Step 2: Convert to fraction form
   78,890.69/118,262.91 = 31,494.30/x
3. Step 3: Cross multiply
   78,890.69x = 118,262.91 × 31,494.30
4. Step 4: Simplify right side
   78,890.69x = 3,724,607,566.41
5. Step 5: Solve for x
   x = 3,724,607,566.41/78,890.69
6. Step 6: Final answer
   x = 47,212.26