Finding the Third Proportional to 21,047,980 and 31,486,141

Step by Step Solution

1. Step 1: Write the proportion equation
   21,047,980 : 31,486,141 = 31,486,141 : x
2. Step 2: Convert to fraction form
   21,047,980/31,486,141 = 31,486,141/x
3. Step 3: Cross multiply
   21,047,980x = 31,486,141 × 31,486,141
4. Step 4: Simplify right side
   21,047,980x = 991,377,075,071,881
5. Step 5: Solve for x
   x = 991,377,075,071,881/21,047,980
6. Step 6: Final answer
   x = 47,100,817.99