Finding the Fourth Proportional to 78,081.68, 117,109.20 and 28,151.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,081.68 : 117,109.20 = 28,151.84 : x
2. Step 2: Convert to fraction form
   78,081.68/117,109.20 = 28,151.84/x
3. Step 3: Cross multiply
   78,081.68x = 117,109.20 × 28,151.84
4. Step 4: Simplify right side
   78,081.68x = 3,296,839,460.93
5. Step 5: Solve for x
   x = 3,296,839,460.93/78,081.68
6. Step 6: Final answer
   x = 42,222.96