Finding the Third Proportional to 70,688.25 and 149,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,688.25 : 149,557.50 = 149,557.50 : x
2. Step 2: Convert to fraction form
   70,688.25/149,557.50 = 149,557.50/x
3. Step 3: Cross multiply
   70,688.25x = 149,557.50 × 149,557.50
4. Step 4: Simplify right side
   70,688.25x = 22,367,445,806.25
5. Step 5: Solve for x
   x = 22,367,445,806.25/70,688.25
6. Step 6: Final answer
   x = 316,423.82