Finding the Fourth Proportional to 139,636.71, 209,505.83 and 68,551.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,636.71 : 209,505.83 = 68,551.88 : x
2. Step 2: Convert to fraction form
   139,636.71/209,505.83 = 68,551.88/x
3. Step 3: Cross multiply
   139,636.71x = 209,505.83 × 68,551.88
4. Step 4: Simplify right side
   139,636.71x = 14,362,017,127.17
5. Step 5: Solve for x
   x = 14,362,017,127.17/139,636.71
6. Step 6: Final answer
   x = 102,852.73