Finding the Fourth Proportional to 23,990.01, 35,801.78 and 21,365.61

Step by Step Solution

1. Step 1: Write the proportion equation
   23,990.01 : 35,801.78 = 21,365.61 : x
2. Step 2: Convert to fraction form
   23,990.01/35,801.78 = 21,365.61/x
3. Step 3: Cross multiply
   23,990.01x = 35,801.78 × 21,365.61
4. Step 4: Simplify right side
   23,990.01x = 764,926,922.20
5. Step 5: Solve for x
   x = 764,926,922.20/23,990.01
6. Step 6: Final answer
   x = 31,885.23