Finding the Fourth Proportional to 35,321.49, 52,974.02 and 13,145.31

Step by Step Solution

1. Step 1: Write the proportion equation
   35,321.49 : 52,974.02 = 13,145.31 : x
2. Step 2: Convert to fraction form
   35,321.49/52,974.02 = 13,145.31/x
3. Step 3: Cross multiply
   35,321.49x = 52,974.02 × 13,145.31
4. Step 4: Simplify right side
   35,321.49x = 696,359,849.12
5. Step 5: Solve for x
   x = 696,359,849.12/35,321.49
6. Step 6: Final answer
   x = 19,714.91