Finding the Fourth Proportional to 42,211.54, 58,518.31 and 39,964.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,211.54 : 58,518.31 = 39,964.42 : x
2. Step 2: Convert to fraction form
   42,211.54/58,518.31 = 39,964.42/x
3. Step 3: Cross multiply
   42,211.54x = 58,518.31 × 39,964.42
4. Step 4: Simplify right side
   42,211.54x = 2,338,650,318.53
5. Step 5: Solve for x
   x = 2,338,650,318.53/42,211.54
6. Step 6: Final answer
   x = 55,403.10