Finding the Third Proportional to 4,287,478 and 8,927,776

Step by Step Solution

1. Step 1: Write the proportion equation
   4,287,478 : 8,927,776 = 8,927,776 : x
2. Step 2: Convert to fraction form
   4,287,478/8,927,776 = 8,927,776/x
3. Step 3: Cross multiply
   4,287,478x = 8,927,776 × 8,927,776
4. Step 4: Simplify right side
   4,287,478x = 79,705,184,306,176
5. Step 5: Solve for x
   x = 79,705,184,306,176/4,287,478
6. Step 6: Final answer
   x = 18,590,225.84