Finding the Third Proportional to 72,688.50 and 155,889

Step by Step Solution

1. Step 1: Write the proportion equation
   72,688.50 : 155,889 = 155,889 : x
2. Step 2: Convert to fraction form
   72,688.50/155,889 = 155,889/x
3. Step 3: Cross multiply
   72,688.50x = 155,889 × 155,889
4. Step 4: Simplify right side
   72,688.50x = 24,301,380,321
5. Step 5: Solve for x
   x = 24,301,380,321/72,688.50
6. Step 6: Final answer
   x = 334,322.21