Finding the Third Proportional to 136,407 and 318,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,407 : 318,601.50 = 318,601.50 : x
2. Step 2: Convert to fraction form
   136,407/318,601.50 = 318,601.50/x
3. Step 3: Cross multiply
   136,407x = 318,601.50 × 318,601.50
4. Step 4: Simplify right side
   136,407x = 101,506,915,802.25
5. Step 5: Solve for x
   x = 101,506,915,802.25/136,407
6. Step 6: Final answer
   x = 744,147.41