Finding the Fourth Proportional to 120,006.42, 180,019.89 and 31,259.94

Step by Step Solution

1. Step 1: Write the proportion equation
   120,006.42 : 180,019.89 = 31,259.94 : x
2. Step 2: Convert to fraction form
   120,006.42/180,019.89 = 31,259.94/x
3. Step 3: Cross multiply
   120,006.42x = 180,019.89 × 31,259.94
4. Step 4: Simplify right side
   120,006.42x = 5,627,410,960.21
5. Step 5: Solve for x
   x = 5,627,410,960.21/120,006.42
6. Step 6: Final answer
   x = 46,892.58