Finding the Fourth Proportional to 139,723.08, 208,940.82 and 103,767.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,723.08 : 208,940.82 = 103,767.43 : x
2. Step 2: Convert to fraction form
   139,723.08/208,940.82 = 103,767.43/x
3. Step 3: Cross multiply
   139,723.08x = 208,940.82 × 103,767.43
4. Step 4: Simplify right side
   139,723.08x = 21,681,251,393.78
5. Step 5: Solve for x
   x = 21,681,251,393.78/139,723.08
6. Step 6: Final answer
   x = 155,173.02