Finding the Fourth Proportional to 120,174.86, 180,262.89 and 31,428.56

Step by Step Solution

1. Step 1: Write the proportion equation
   120,174.86 : 180,262.89 = 31,428.56 : x
2. Step 2: Convert to fraction form
   120,174.86/180,262.89 = 31,428.56/x
3. Step 3: Cross multiply
   120,174.86x = 180,262.89 × 31,428.56
4. Step 4: Simplify right side
   120,174.86x = 5,665,403,054.14
5. Step 5: Solve for x
   x = 5,665,403,054.14/120,174.86
6. Step 6: Final answer
   x = 47,143.00