Finding the Fourth Proportional to 139,390.54, 208,881.69 and 69,129.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,390.54 : 208,881.69 = 69,129.52 : x
2. Step 2: Convert to fraction form
   139,390.54/208,881.69 = 69,129.52/x
3. Step 3: Cross multiply
   139,390.54x = 208,881.69 × 69,129.52
4. Step 4: Simplify right side
   139,390.54x = 14,439,890,966.49
5. Step 5: Solve for x
   x = 14,439,890,966.49/139,390.54
6. Step 6: Final answer
   x = 103,593.05