Finding the Third Proportional to 1,991,680 and 4,370,368

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991,680 : 4,370,368 = 4,370,368 : x
2. Step 2: Convert to fraction form
   1,991,680/4,370,368 = 4,370,368/x
3. Step 3: Cross multiply
   1,991,680x = 4,370,368 × 4,370,368
4. Step 4: Simplify right side
   1,991,680x = 19,100,116,455,424
5. Step 5: Solve for x
   x = 19,100,116,455,424/1,991,680
6. Step 6: Final answer
   x = 9,589,952.43