Finding the Fourth Proportional to 538,090.29, 807,181.88 and 138,727.62

Step by Step Solution

1. Step 1: Write the proportion equation
   538,090.29 : 807,181.88 = 138,727.62 : x
2. Step 2: Convert to fraction form
   538,090.29/807,181.88 = 138,727.62/x
3. Step 3: Cross multiply
   538,090.29x = 807,181.88 × 138,727.62
4. Step 4: Simplify right side
   538,090.29x = 111,978,420,425.89
5. Step 5: Solve for x
   x = 111,978,420,425.89/538,090.29
6. Step 6: Final answer
   x = 208,103.40