Finding the Fourth Proportional to 117,109.88, 161,689.68 and 78,926.22

Step by Step Solution

1. Step 1: Write the proportion equation
   117,109.88 : 161,689.68 = 78,926.22 : x
2. Step 2: Convert to fraction form
   117,109.88/161,689.68 = 78,926.22/x
3. Step 3: Cross multiply
   117,109.88x = 161,689.68 × 78,926.22
4. Step 4: Simplify right side
   117,109.88x = 12,761,555,255.41
5. Step 5: Solve for x
   x = 12,761,555,255.41/117,109.88
6. Step 6: Final answer
   x = 108,970.78