Finding the Third Proportional to 4,549,940 and 9,903,320

Step by Step Solution

1. Step 1: Write the proportion equation
   4,549,940 : 9,903,320 = 9,903,320 : x
2. Step 2: Convert to fraction form
   4,549,940/9,903,320 = 9,903,320/x
3. Step 3: Cross multiply
   4,549,940x = 9,903,320 × 9,903,320
4. Step 4: Simplify right side
   4,549,940x = 98,075,747,022,400
5. Step 5: Solve for x
   x = 98,075,747,022,400/4,549,940
6. Step 6: Final answer
   x = 21,555,393.48