Finding the Fourth Proportional to 238,405.38, 357,498.81 and 142,386.54

Step by Step Solution

1. Step 1: Write the proportion equation
   238,405.38 : 357,498.81 = 142,386.54 : x
2. Step 2: Convert to fraction form
   238,405.38/357,498.81 = 142,386.54/x
3. Step 3: Cross multiply
   238,405.38x = 357,498.81 × 142,386.54
4. Step 4: Simplify right side
   238,405.38x = 50,903,018,610.02
5. Step 5: Solve for x
   x = 50,903,018,610.02/238,405.38
6. Step 6: Final answer
   x = 213,514.55