Finding the Fourth Proportional to 139,011.58, 208,582.17 and 82,849.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,011.58 : 208,582.17 = 82,849.42 : x
2. Step 2: Convert to fraction form
   139,011.58/208,582.17 = 82,849.42/x
3. Step 3: Cross multiply
   139,011.58x = 208,582.17 × 82,849.42
4. Step 4: Simplify right side
   139,011.58x = 17,280,911,806.84
5. Step 5: Solve for x
   x = 17,280,911,806.84/139,011.58
6. Step 6: Final answer
   x = 124,312.75