Finding the Fourth Proportional to 139,929.42, 209,894.06 and 51,134.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,929.42 : 209,894.06 = 51,134.48 : x
2. Step 2: Convert to fraction form
   139,929.42/209,894.06 = 51,134.48/x
3. Step 3: Cross multiply
   139,929.42x = 209,894.06 × 51,134.48
4. Step 4: Simplify right side
   139,929.42x = 10,732,822,308.05
5. Step 5: Solve for x
   x = 10,732,822,308.05/139,929.42
6. Step 6: Final answer
   x = 76,701.69