Finding the Fourth Proportional to 151,031.31, 208,214.71 and 120,508.08

Step by Step Solution

1. Step 1: Write the proportion equation
   151,031.31 : 208,214.71 = 120,508.08 : x
2. Step 2: Convert to fraction form
   151,031.31/208,214.71 = 120,508.08/x
3. Step 3: Cross multiply
   151,031.31x = 208,214.71 × 120,508.08
4. Step 4: Simplify right side
   151,031.31x = 25,091,554,929.86
5. Step 5: Solve for x
   x = 25,091,554,929.86/151,031.31
6. Step 6: Final answer
   x = 166,134.79