Finding the Fourth Proportional to 31,104, 42,938.84 and 21,551.13

Step by Step Solution

1. Step 1: Write the proportion equation
   31,104 : 42,938.84 = 21,551.13 : x
2. Step 2: Convert to fraction form
   31,104/42,938.84 = 21,551.13/x
3. Step 3: Cross multiply
   31,104x = 42,938.84 × 21,551.13
4. Step 4: Simplify right side
   31,104x = 925,380,576.77
5. Step 5: Solve for x
   x = 925,380,576.77/31,104
6. Step 6: Final answer
   x = 29,751.18