Finding the Fourth Proportional to 48,012.30, 72,018.51 and 12,951.99

Step by Step Solution

1. Step 1: Write the proportion equation
   48,012.30 : 72,018.51 = 12,951.99 : x
2. Step 2: Convert to fraction form
   48,012.30/72,018.51 = 12,951.99/x
3. Step 3: Cross multiply
   48,012.30x = 72,018.51 × 12,951.99
4. Step 4: Simplify right side
   48,012.30x = 932,783,021.33
5. Step 5: Solve for x
   x = 932,783,021.33/48,012.30
6. Step 6: Final answer
   x = 19,428.00