Finding the Third Proportional to 1,991,384 and 4,369,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,384 : 4,369,840 = 4,369,840 : x
2. Step 2: Convert to fraction form
   1,991,384/4,369,840 = 4,369,840/x
3. Step 3: Cross multiply
   1,991,384x = 4,369,840 × 4,369,840
4. Step 4: Simplify right side
   1,991,384x = 19,095,501,625,600
5. Step 5: Solve for x
   x = 19,095,501,625,600/1,991,384
6. Step 6: Final answer
   x = 9,589,060.49