Finding the Fourth Proportional to 78,579.50, 117,916.56 and 28,663.97

Step by Step Solution

1. Step 1: Write the proportion equation
   78,579.50 : 117,916.56 = 28,663.97 : x
2. Step 2: Convert to fraction form
   78,579.50/117,916.56 = 28,663.97/x
3. Step 3: Cross multiply
   78,579.50x = 117,916.56 × 28,663.97
4. Step 4: Simplify right side
   78,579.50x = 3,379,956,148.76
5. Step 5: Solve for x
   x = 3,379,956,148.76/78,579.50
6. Step 6: Final answer
   x = 43,013.21