Finding the Fourth Proportional to 538,100.72, 742,514.37 and 308,646.15

Step by Step Solution

1. Step 1: Write the proportion equation
   538,100.72 : 742,514.37 = 308,646.15 : x
2. Step 2: Convert to fraction form
   538,100.72/742,514.37 = 308,646.15/x
3. Step 3: Cross multiply
   538,100.72x = 742,514.37 × 308,646.15
4. Step 4: Simplify right side
   538,100.72x = 229,174,198,546.39
5. Step 5: Solve for x
   x = 229,174,198,546.39/538,100.72
6. Step 6: Final answer
   x = 425,894.62