Finding the Fourth Proportional to 31,146.16, 42,976.56 and 18,410.08

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.16 : 42,976.56 = 18,410.08 : x
2. Step 2: Convert to fraction form
   31,146.16/42,976.56 = 18,410.08/x
3. Step 3: Cross multiply
   31,146.16x = 42,976.56 × 18,410.08
4. Step 4: Simplify right side
   31,146.16x = 791,201,907.72
5. Step 5: Solve for x
   x = 791,201,907.72/31,146.16
6. Step 6: Final answer
   x = 25,402.87