Finding the Third Proportional to 155,433,478 and 321,871,940

Step by Step Solution

1. Step 1: Write the proportion equation
   155,433,478 : 321,871,940 = 321,871,940 : x
2. Step 2: Convert to fraction form
   155,433,478/321,871,940 = 321,871,940/x
3. Step 3: Cross multiply
   155,433,478x = 321,871,940 × 321,871,940
4. Step 4: Simplify right side
   155,433,478x = 103,601,545,759,363,600
5. Step 5: Solve for x
   x = 103,601,545,759,363,600/155,433,478
6. Step 6: Final answer
   x = 666,533,021.67