Finding the Fourth Proportional to 25,836.16, 35,664.72 and 21,877.76

Step by Step Solution

1. Step 1: Write the proportion equation
   25,836.16 : 35,664.72 = 21,877.76 : x
2. Step 2: Convert to fraction form
   25,836.16/35,664.72 = 21,877.76/x
3. Step 3: Cross multiply
   25,836.16x = 35,664.72 × 21,877.76
4. Step 4: Simplify right side
   25,836.16x = 780,264,184.63
5. Step 5: Solve for x
   x = 780,264,184.63/25,836.16
6. Step 6: Final answer
   x = 30,200.47