Finding the Fourth Proportional to 139,865.98, 209,981.91 and 83,043.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,865.98 : 209,981.91 = 83,043.62 : x
2. Step 2: Convert to fraction form
   139,865.98/209,981.91 = 83,043.62/x
3. Step 3: Cross multiply
   139,865.98x = 209,981.91 × 83,043.62
4. Step 4: Simplify right side
   139,865.98x = 17,437,657,916.45
5. Step 5: Solve for x
   x = 17,437,657,916.45/139,865.98
6. Step 6: Final answer
   x = 124,674.05