Finding the Fourth Proportional to 78,485.98, 117,802.96 and 28,614.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.98 : 117,802.96 = 28,614.28 : x
2. Step 2: Convert to fraction form
   78,485.98/117,802.96 = 28,614.28/x
3. Step 3: Cross multiply
   78,485.98x = 117,802.96 × 28,614.28
4. Step 4: Simplify right side
   78,485.98x = 3,370,846,882.27
5. Step 5: Solve for x
   x = 3,370,846,882.27/78,485.98
6. Step 6: Final answer
   x = 42,948.40