Finding the Fourth Proportional to 40,219.89, 55,442.05 and 31,706.79

Step by Step Solution

1. Step 1: Write the proportion equation
   40,219.89 : 55,442.05 = 31,706.79 : x
2. Step 2: Convert to fraction form
   40,219.89/55,442.05 = 31,706.79/x
3. Step 3: Cross multiply
   40,219.89x = 55,442.05 × 31,706.79
4. Step 4: Simplify right side
   40,219.89x = 1,757,889,436.52
5. Step 5: Solve for x
   x = 1,757,889,436.52/40,219.89
6. Step 6: Final answer
   x = 43,706.97