Finding the Third Proportional to 86,739,428 and 189,300,988

Step by Step Solution

1. Step 1: Write the proportion equation
   86,739,428 : 189,300,988 = 189,300,988 : x
2. Step 2: Convert to fraction form
   86,739,428/189,300,988 = 189,300,988/x
3. Step 3: Cross multiply
   86,739,428x = 189,300,988 × 189,300,988
4. Step 4: Simplify right side
   86,739,428x = 35,834,864,057,776,144
5. Step 5: Solve for x
   x = 35,834,864,057,776,144/86,739,428
6. Step 6: Final answer
   x = 413,132,353.81