Finding the Fourth Proportional to 139,396.77, 209,117.02 and 83,300.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,396.77 : 209,117.02 = 83,300.22 : x
2. Step 2: Convert to fraction form
   139,396.77/209,117.02 = 83,300.22/x
3. Step 3: Cross multiply
   139,396.77x = 209,117.02 × 83,300.22
4. Step 4: Simplify right side
   139,396.77x = 17,419,493,771.74
5. Step 5: Solve for x
   x = 17,419,493,771.74/139,396.77
6. Step 6: Final answer
   x = 124,963.40