Finding the Fourth Proportional to 78,450.32, 117,638.52 and 28,495.19

Step by Step Solution

1. Step 1: Write the proportion equation
   78,450.32 : 117,638.52 = 28,495.19 : x
2. Step 2: Convert to fraction form
   78,450.32/117,638.52 = 28,495.19/x
3. Step 3: Cross multiply
   78,450.32x = 117,638.52 × 28,495.19
4. Step 4: Simplify right side
   78,450.32x = 3,352,131,978.72
5. Step 5: Solve for x
   x = 3,352,131,978.72/78,450.32
6. Step 6: Final answer
   x = 42,729.36