Finding the Third Proportional to 153,030 and 318,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,030 : 318,475.50 = 318,475.50 : x
2. Step 2: Convert to fraction form
   153,030/318,475.50 = 318,475.50/x
3. Step 3: Cross multiply
   153,030x = 318,475.50 × 318,475.50
4. Step 4: Simplify right side
   153,030x = 101,426,644,100.25
5. Step 5: Solve for x
   x = 101,426,644,100.25/153,030
6. Step 6: Final answer
   x = 662,789.28