Finding the Fourth Proportional to 120,047.28, 180,071.04 and 31,300.70

Step by Step Solution

1. Step 1: Write the proportion equation
   120,047.28 : 180,071.04 = 31,300.70 : x
2. Step 2: Convert to fraction form
   120,047.28/180,071.04 = 31,300.70/x
3. Step 3: Cross multiply
   120,047.28x = 180,071.04 × 31,300.70
4. Step 4: Simplify right side
   120,047.28x = 5,636,349,601.73
5. Step 5: Solve for x
   x = 5,636,349,601.73/120,047.28
6. Step 6: Final answer
   x = 46,951.08