Finding the Third Proportional to 9,978,916 and 13,903,142

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978,916 : 13,903,142 = 13,903,142 : x
2. Step 2: Convert to fraction form
   9,978,916/13,903,142 = 13,903,142/x
3. Step 3: Cross multiply
   9,978,916x = 13,903,142 × 13,903,142
4. Step 4: Simplify right side
   9,978,916x = 193,297,357,472,164
5. Step 5: Solve for x
   x = 193,297,357,472,164/9,978,916
6. Step 6: Final answer
   x = 19,370,576.67