Finding the Fourth Proportional to 139,382.91, 208,557.67 and 83,253.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,382.91 : 208,557.67 = 83,253.55 : x
2. Step 2: Convert to fraction form
   139,382.91/208,557.67 = 83,253.55/x
3. Step 3: Cross multiply
   139,382.91x = 208,557.67 × 83,253.55
4. Step 4: Simplify right side
   139,382.91x = 17,363,166,407.23
5. Step 5: Solve for x
   x = 17,363,166,407.23/139,382.91
6. Step 6: Final answer
   x = 124,571.70