Finding the Fourth Proportional to 78,222.78, 117,343.35 and 28,326.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,222.78 : 117,343.35 = 28,326.42 : x
2. Step 2: Convert to fraction form
   78,222.78/117,343.35 = 28,326.42/x
3. Step 3: Cross multiply
   78,222.78x = 117,343.35 × 28,326.42
4. Step 4: Simplify right side
   78,222.78x = 3,323,917,016.31
5. Step 5: Solve for x
   x = 3,323,917,016.31/78,222.78
6. Step 6: Final answer
   x = 42,492.95