Finding the Fourth Proportional to 70,683.75, 105,998.69 and 31,219.34

Step by Step Solution

1. Step 1: Write the proportion equation
   70,683.75 : 105,998.69 = 31,219.34 : x
2. Step 2: Convert to fraction form
   70,683.75/105,998.69 = 31,219.34/x
3. Step 3: Cross multiply
   70,683.75x = 105,998.69 × 31,219.34
4. Step 4: Simplify right side
   70,683.75x = 3,309,208,690.72
5. Step 5: Solve for x
   x = 3,309,208,690.72/70,683.75
6. Step 6: Final answer
   x = 46,817.11