Finding the Fourth Proportional to 50,071.90, 69,099.28 and 31,209

Step by Step Solution

1. Step 1: Write the proportion equation
   50,071.90 : 69,099.28 = 31,209 : x
2. Step 2: Convert to fraction form
   50,071.90/69,099.28 = 31,209/x
3. Step 3: Cross multiply
   50,071.90x = 69,099.28 × 31,209
4. Step 4: Simplify right side
   50,071.90x = 2,156,519,429.52
5. Step 5: Solve for x
   x = 2,156,519,429.52/50,071.90
6. Step 6: Final answer
   x = 43,068.46