Finding the Fourth Proportional to 139,876.94, 209,998.32 and 83,054.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,876.94 : 209,998.32 = 83,054.60 : x
2. Step 2: Convert to fraction form
   139,876.94/209,998.32 = 83,054.60/x
3. Step 3: Cross multiply
   139,876.94x = 209,998.32 × 83,054.60
4. Step 4: Simplify right side
   139,876.94x = 17,441,326,468.27
5. Step 5: Solve for x
   x = 17,441,326,468.27/139,876.94
6. Step 6: Final answer
   x = 124,690.51