Finding the Fourth Proportional to 49,990.08, 69,000 and 31,116

Step by Step Solution

1. Step 1: Write the proportion equation
   49,990.08 : 69,000 = 31,116 : x
2. Step 2: Convert to fraction form
   49,990.08/69,000 = 31,116/x
3. Step 3: Cross multiply
   49,990.08x = 69,000 × 31,116
4. Step 4: Simplify right side
   49,990.08x = 2,147,004,000
5. Step 5: Solve for x
   x = 2,147,004,000/49,990.08
6. Step 6: Final answer
   x = 42,948.60