Finding the Third Proportional to 86,499,099 and 189,428,578.88

Step by Step Solution

1. Step 1: Write the proportion equation
   86,499,099 : 189,428,578.88 = 189,428,578.88 : x
2. Step 2: Convert to fraction form
   86,499,099/189,428,578.88 = 189,428,578.88/x
3. Step 3: Cross multiply
   86,499,099x = 189,428,578.88 × 189,428,578.88
4. Step 4: Simplify right side
   86,499,099x = 35,883,186,494,602,096
5. Step 5: Solve for x
   x = 35,883,186,494,602,096/86,499,099
6. Step 6: Final answer
   x = 414,838,846.99