Finding the Fourth Proportional to 21,931.94, 32,902.78 and 10,238.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,931.94 : 32,902.78 = 10,238.78 : x
2. Step 2: Convert to fraction form
   21,931.94/32,902.78 = 10,238.78/x
3. Step 3: Cross multiply
   21,931.94x = 32,902.78 × 10,238.78
4. Step 4: Simplify right side
   21,931.94x = 336,884,325.81
5. Step 5: Solve for x
   x = 336,884,325.81/21,931.94
6. Step 6: Final answer
   x = 15,360.44