Finding the Fourth Proportional to 102,295.69, 153,443.57 and 31,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,295.69 : 153,443.57 = 31,218.72 : x
2. Step 2: Convert to fraction form
   102,295.69/153,443.57 = 31,218.72/x
3. Step 3: Cross multiply
   102,295.69x = 153,443.57 × 31,218.72
4. Step 4: Simplify right side
   102,295.69x = 4,790,311,847.63
5. Step 5: Solve for x
   x = 4,790,311,847.63/102,295.69
6. Step 6: Final answer
   x = 46,828.09