Finding the Third Proportional to 139,141.50 and 210,001.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,141.50 : 210,001.50 = 210,001.50 : x
2. Step 2: Convert to fraction form
   139,141.50/210,001.50 = 210,001.50/x
3. Step 3: Cross multiply
   139,141.50x = 210,001.50 × 210,001.50
4. Step 4: Simplify right side
   139,141.50x = 44,100,630,002.25
5. Step 5: Solve for x
   x = 44,100,630,002.25/139,141.50
6. Step 6: Final answer
   x = 316,948.07