Finding the Fourth Proportional to 31,105.35, 42,928.47 and 18,362.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.35 : 42,928.47 = 18,362.74 : x
2. Step 2: Convert to fraction form
   31,105.35/42,928.47 = 18,362.74/x
3. Step 3: Cross multiply
   31,105.35x = 42,928.47 × 18,362.74
4. Step 4: Simplify right side
   31,105.35x = 788,284,333.21
5. Step 5: Solve for x
   x = 788,284,333.21/31,105.35
6. Step 6: Final answer
   x = 25,342.40