Finding the Third Proportional to 3,973,581 and 8,582,391

Step by Step Solution

1. Step 1: Write the proportion equation
   3,973,581 : 8,582,391 = 8,582,391 : x
2. Step 2: Convert to fraction form
   3,973,581/8,582,391 = 8,582,391/x
3. Step 3: Cross multiply
   3,973,581x = 8,582,391 × 8,582,391
4. Step 4: Simplify right side
   3,973,581x = 73,657,435,276,881
5. Step 5: Solve for x
   x = 73,657,435,276,881/3,973,581
6. Step 6: Final answer
   x = 18,536,789.68