Finding the Fourth Proportional to 139,287, 209,013.52 and 50,547.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,287 : 209,013.52 = 50,547.43 : x
2. Step 2: Convert to fraction form
   139,287/209,013.52 = 50,547.43/x
3. Step 3: Cross multiply
   139,287x = 209,013.52 × 50,547.43
4. Step 4: Simplify right side
   139,287x = 10,565,096,271.25
5. Step 5: Solve for x
   x = 10,565,096,271.25/139,287
6. Step 6: Final answer
   x = 75,851.27