Finding the Fourth Proportional to 35,623.89, 49,176.72 and 21,288.78

Step by Step Solution

1. Step 1: Write the proportion equation
   35,623.89 : 49,176.72 = 21,288.78 : x
2. Step 2: Convert to fraction form
   35,623.89/49,176.72 = 21,288.78/x
3. Step 3: Cross multiply
   35,623.89x = 49,176.72 × 21,288.78
4. Step 4: Simplify right side
   35,623.89x = 1,046,912,373.20
5. Step 5: Solve for x
   x = 1,046,912,373.20/35,623.89
6. Step 6: Final answer
   x = 29,387.93