Finding the Fourth Proportional to 139,868.61, 209,985.85 and 83,046.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.61 : 209,985.85 = 83,046.25 : x
2. Step 2: Convert to fraction form
   139,868.61/209,985.85 = 83,046.25/x
3. Step 3: Cross multiply
   139,868.61x = 209,985.85 × 83,046.25
4. Step 4: Simplify right side
   139,868.61x = 17,438,537,395.56
5. Step 5: Solve for x
   x = 17,438,537,395.56/139,868.61
6. Step 6: Final answer
   x = 124,677.99