Finding the Fourth Proportional to 81,280.80, 121,942.46 and 31,362.53

Step by Step Solution

1. Step 1: Write the proportion equation
   81,280.80 : 121,942.46 = 31,362.53 : x
2. Step 2: Convert to fraction form
   81,280.80/121,942.46 = 31,362.53/x
3. Step 3: Cross multiply
   81,280.80x = 121,942.46 × 31,362.53
4. Step 4: Simplify right side
   81,280.80x = 3,824,423,528.72
5. Step 5: Solve for x
   x = 3,824,423,528.72/81,280.80
6. Step 6: Final answer
   x = 47,051.99