Finding the Fourth Proportional to 31,105.80, 42,913.76 and 19,148.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.80 : 42,913.76 = 19,148.36 : x
2. Step 2: Convert to fraction form
   31,105.80/42,913.76 = 19,148.36/x
3. Step 3: Cross multiply
   31,105.80x = 42,913.76 × 19,148.36
4. Step 4: Simplify right side
   31,105.80x = 821,727,815.12
5. Step 5: Solve for x
   x = 821,727,815.12/31,105.80
6. Step 6: Final answer
   x = 26,417.19