Finding the Fourth Proportional to 70,870.38, 106,232.61 and 31,446.06

Step by Step Solution

1. Step 1: Write the proportion equation
   70,870.38 : 106,232.61 = 31,446.06 : x
2. Step 2: Convert to fraction form
   70,870.38/106,232.61 = 31,446.06/x
3. Step 3: Cross multiply
   70,870.38x = 106,232.61 × 31,446.06
4. Step 4: Simplify right side
   70,870.38x = 3,340,597,028.02
5. Step 5: Solve for x
   x = 3,340,597,028.02/70,870.38
6. Step 6: Final answer
   x = 47,136.72