Finding the Fourth Proportional to 13,099.47, 18,077.86 and 7,722.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,099.47 : 18,077.86 = 7,722.13 : x
2. Step 2: Convert to fraction form
   13,099.47/18,077.86 = 7,722.13/x
3. Step 3: Cross multiply
   13,099.47x = 18,077.86 × 7,722.13
4. Step 4: Simplify right side
   13,099.47x = 139,599,585.04
5. Step 5: Solve for x
   x = 139,599,585.04/13,099.47
6. Step 6: Final answer
   x = 10,656.89