Finding the Fourth Proportional to 12,999.89, 19,461.57 and 8,053.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999.89 : 19,461.57 = 8,053.63 : x
2. Step 2: Convert to fraction form
   12,999.89/19,461.57 = 8,053.63/x
3. Step 3: Cross multiply
   12,999.89x = 19,461.57 × 8,053.63
4. Step 4: Simplify right side
   12,999.89x = 156,736,205.14
5. Step 5: Solve for x
   x = 156,736,205.14/12,999.89
6. Step 6: Final answer
   x = 12,056.73