Finding the Fourth Proportional to 39,601.86, 54,650.58 and 21,696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,601.86 : 54,650.58 = 21,696.72 : x
2. Step 2: Convert to fraction form
   39,601.86/54,650.58 = 21,696.72/x
3. Step 3: Cross multiply
   39,601.86x = 54,650.58 × 21,696.72
4. Step 4: Simplify right side
   39,601.86x = 1,185,738,332.10
5. Step 5: Solve for x
   x = 1,185,738,332.10/39,601.86
6. Step 6: Final answer
   x = 29,941.48