Finding the Third Proportional to 21,407,440 and 30,516,672

Step by Step Solution

1. Step 1: Write the proportion equation
   21,407,440 : 30,516,672 = 30,516,672 : x
2. Step 2: Convert to fraction form
   21,407,440/30,516,672 = 30,516,672/x
3. Step 3: Cross multiply
   21,407,440x = 30,516,672 × 30,516,672
4. Step 4: Simplify right side
   21,407,440x = 931,267,269,955,584
5. Step 5: Solve for x
   x = 931,267,269,955,584/21,407,440
6. Step 6: Final answer
   x = 43,502,038.07