Finding the Fourth Proportional to 78,572.82, 117,822.69 and 28,618.14

Step by Step Solution

1. Step 1: Write the proportion equation
   78,572.82 : 117,822.69 = 28,618.14 : x
2. Step 2: Convert to fraction form
   78,572.82/117,822.69 = 28,618.14/x
3. Step 3: Cross multiply
   78,572.82x = 117,822.69 × 28,618.14
4. Step 4: Simplify right side
   78,572.82x = 3,371,866,237.60
5. Step 5: Solve for x
   x = 3,371,866,237.60/78,572.82
6. Step 6: Final answer
   x = 42,913.90