Finding the Third Proportional to 5,585,680 and 8,540,840

Step by Step Solution

1. Step 1: Write the proportion equation
   5,585,680 : 8,540,840 = 8,540,840 : x
2. Step 2: Convert to fraction form
   5,585,680/8,540,840 = 8,540,840/x
3. Step 3: Cross multiply
   5,585,680x = 8,540,840 × 8,540,840
4. Step 4: Simplify right side
   5,585,680x = 72,945,947,905,600
5. Step 5: Solve for x
   x = 72,945,947,905,600/5,585,680
6. Step 6: Final answer
   x = 13,059,457.02