Finding the Third Proportional to 2,160,931.50 and 4,688,145

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160,931.50 : 4,688,145 = 4,688,145 : x
2. Step 2: Convert to fraction form
   2,160,931.50/4,688,145 = 4,688,145/x
3. Step 3: Cross multiply
   2,160,931.50x = 4,688,145 × 4,688,145
4. Step 4: Simplify right side
   2,160,931.50x = 21,978,703,541,025
5. Step 5: Solve for x
   x = 21,978,703,541,025/2,160,931.50
6. Step 6: Final answer
   x = 10,170,939.50