Finding the Fourth Proportional to 139,881.06, 209,819.97 and 83,736.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,881.06 : 209,819.97 = 83,736.81 : x
2. Step 2: Convert to fraction form
   139,881.06/209,819.97 = 83,736.81/x
3. Step 3: Cross multiply
   139,881.06x = 209,819.97 × 83,736.81
4. Step 4: Simplify right side
   139,881.06x = 17,569,654,962.10
5. Step 5: Solve for x
   x = 17,569,654,962.10/139,881.06
6. Step 6: Final answer
   x = 125,604.25