Finding the Fourth Proportional to 78,483.98, 117,799.96 and 28,612.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,483.98 : 117,799.96 = 28,612.28 : x
2. Step 2: Convert to fraction form
   78,483.98/117,799.96 = 28,612.28/x
3. Step 3: Cross multiply
   78,483.98x = 117,799.96 × 28,612.28
4. Step 4: Simplify right side
   78,483.98x = 3,370,525,439.51
5. Step 5: Solve for x
   x = 3,370,525,439.51/78,483.98
6. Step 6: Final answer
   x = 42,945.39