Finding the Third Proportional to 141,172.50 and 212,071.50

Step by Step Solution

1. Step 1: Write the proportion equation
   141,172.50 : 212,071.50 = 212,071.50 : x
2. Step 2: Convert to fraction form
   141,172.50/212,071.50 = 212,071.50/x
3. Step 3: Cross multiply
   141,172.50x = 212,071.50 × 212,071.50
4. Step 4: Simplify right side
   141,172.50x = 44,974,321,112.25
5. Step 5: Solve for x
   x = 44,974,321,112.25/141,172.50
6. Step 6: Final answer
   x = 318,577.07