Finding the Fourth Proportional to 12,999.34, 19,500.63 and 5,102.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999.34 : 19,500.63 = 5,102.11 : x
2. Step 2: Convert to fraction form
   12,999.34/19,500.63 = 5,102.11/x
3. Step 3: Cross multiply
   12,999.34x = 19,500.63 × 5,102.11
4. Step 4: Simplify right side
   12,999.34x = 99,494,359.33
5. Step 5: Solve for x
   x = 99,494,359.33/12,999.34
6. Step 6: Final answer
   x = 7,653.80