Finding the Third Proportional to 139,071.94 and 188,917.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,071.94 : 188,917.31 = 188,917.31 : x
2. Step 2: Convert to fraction form
   139,071.94/188,917.31 = 188,917.31/x
3. Step 3: Cross multiply
   139,071.94x = 188,917.31 × 188,917.31
4. Step 4: Simplify right side
   139,071.94x = 35,689,750,962.22
5. Step 5: Solve for x
   x = 35,689,750,962.22/139,071.94
6. Step 6: Final answer
   x = 256,627.98