Finding the Third Proportional to 8,690,191.50 and 13,147,113

Step by Step Solution

1. Step 1: Write the proportion equation
   8,690,191.50 : 13,147,113 = 13,147,113 : x
2. Step 2: Convert to fraction form
   8,690,191.50/13,147,113 = 13,147,113/x
3. Step 3: Cross multiply
   8,690,191.50x = 13,147,113 × 13,147,113
4. Step 4: Simplify right side
   8,690,191.50x = 172,846,580,234,769
5. Step 5: Solve for x
   x = 172,846,580,234,769/8,690,191.50
6. Step 6: Final answer
   x = 19,889,847.10