Finding the Third Proportional to 118,615.50 and 139,528.69

Step by Step Solution

1. Step 1: Write the proportion equation
   118,615.50 : 139,528.69 = 139,528.69 : x
2. Step 2: Convert to fraction form
   118,615.50/139,528.69 = 139,528.69/x
3. Step 3: Cross multiply
   118,615.50x = 139,528.69 × 139,528.69
4. Step 4: Simplify right side
   118,615.50x = 19,468,254,635.47
5. Step 5: Solve for x
   x = 19,468,254,635.47/118,615.50
6. Step 6: Final answer
   x = 164,129.09