Finding the Fourth Proportional to 120,156.50, 180,245.00 and 31,409.86

Step by Step Solution

1. Step 1: Write the proportion equation
   120,156.50 : 180,245.00 = 31,409.86 : x
2. Step 2: Convert to fraction form
   120,156.50/180,245.00 = 31,409.86/x
3. Step 3: Cross multiply
   120,156.50x = 180,245.00 × 31,409.86
4. Step 4: Simplify right side
   120,156.50x = 5,661,470,004.89
5. Step 5: Solve for x
   x = 5,661,470,004.89/120,156.50
6. Step 6: Final answer
   x = 47,117.47