Finding the Fourth Proportional to 139,384.16, 208,559.55 and 83,254.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,384.16 : 208,559.55 = 83,254.80 : x
2. Step 2: Convert to fraction form
   139,384.16/208,559.55 = 83,254.80/x
3. Step 3: Cross multiply
   139,384.16x = 208,559.55 × 83,254.80
4. Step 4: Simplify right side
   139,384.16x = 17,363,583,623.34
5. Step 5: Solve for x
   x = 17,363,583,623.34/139,384.16
6. Step 6: Final answer
   x = 124,573.58