Finding the Fourth Proportional to 49,521.72, 68,340.90 and 30,391.91

Step by Step Solution

1. Step 1: Write the proportion equation
   49,521.72 : 68,340.90 = 30,391.91 : x
2. Step 2: Convert to fraction form
   49,521.72/68,340.90 = 30,391.91/x
3. Step 3: Cross multiply
   49,521.72x = 68,340.90 × 30,391.91
4. Step 4: Simplify right side
   49,521.72x = 2,077,010,140.41
5. Step 5: Solve for x
   x = 2,077,010,140.41/49,521.72
6. Step 6: Final answer
   x = 41,941.40