Finding the Fourth Proportional to 23,978.76, 35,785.02 and 21,354.36

Step by Step Solution

1. Step 1: Write the proportion equation
   23,978.76 : 35,785.02 = 21,354.36 : x
2. Step 2: Convert to fraction form
   23,978.76/35,785.02 = 21,354.36/x
3. Step 3: Cross multiply
   23,978.76x = 35,785.02 × 21,354.36
4. Step 4: Simplify right side
   23,978.76x = 764,166,199.69
5. Step 5: Solve for x
   x = 764,166,199.69/23,978.76
6. Step 6: Final answer
   x = 31,868.46