Finding the Fourth Proportional to 31,152, 46,730.79 and 12,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152 : 46,730.79 = 12,427.50 : x
2. Step 2: Convert to fraction form
   31,152/46,730.79 = 12,427.50/x
3. Step 3: Cross multiply
   31,152x = 46,730.79 × 12,427.50
4. Step 4: Simplify right side
   31,152x = 580,746,892.73
5. Step 5: Solve for x
   x = 580,746,892.73/31,152
6. Step 6: Final answer
   x = 18,642.36