Finding the Fourth Proportional to 35,665.52, 49,218.74 and 21,515.63

Step by Step Solution

1. Step 1: Write the proportion equation
   35,665.52 : 49,218.74 = 21,515.63 : x
2. Step 2: Convert to fraction form
   35,665.52/49,218.74 = 21,515.63/x
3. Step 3: Cross multiply
   35,665.52x = 49,218.74 × 21,515.63
4. Step 4: Simplify right side
   35,665.52x = 1,058,971,925.92
5. Step 5: Solve for x
   x = 1,058,971,925.92/35,665.52
6. Step 6: Final answer
   x = 29,691.76