Finding the Fourth Proportional to 42,196.70, 63,239.68 and 31,051.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,196.70 : 63,239.68 = 31,051.20 : x
2. Step 2: Convert to fraction form
   42,196.70/63,239.68 = 31,051.20/x
3. Step 3: Cross multiply
   42,196.70x = 63,239.68 × 31,051.20
4. Step 4: Simplify right side
   42,196.70x = 1,963,667,951.62
5. Step 5: Solve for x
   x = 1,963,667,951.62/42,196.70
6. Step 6: Final answer
   x = 46,536.05