Finding the Third Proportional to 128,579,280 and 194,064,636

Step by Step Solution

1. Step 1: Write the proportion equation
   128,579,280 : 194,064,636 = 194,064,636 : x
2. Step 2: Convert to fraction form
   128,579,280/194,064,636 = 194,064,636/x
3. Step 3: Cross multiply
   128,579,280x = 194,064,636 × 194,064,636
4. Step 4: Simplify right side
   128,579,280x = 37,661,082,945,812,496
5. Step 5: Solve for x
   x = 37,661,082,945,812,496/128,579,280
6. Step 6: Final answer
   x = 292,901,647.50