Finding the Third Proportional to 4,635,978 and 9,402,970

Step by Step Solution

1. Step 1: Write the proportion equation
   4,635,978 : 9,402,970 = 9,402,970 : x
2. Step 2: Convert to fraction form
   4,635,978/9,402,970 = 9,402,970/x
3. Step 3: Cross multiply
   4,635,978x = 9,402,970 × 9,402,970
4. Step 4: Simplify right side
   4,635,978x = 88,415,844,820,900
5. Step 5: Solve for x
   x = 88,415,844,820,900/4,635,978
6. Step 6: Final answer
   x = 19,071,670.49