Finding the Third Proportional to 42,672 and 63,840

Step by Step Solution

1. Step 1: Write the proportion equation
   42,672 : 63,840 = 63,840 : x
2. Step 2: Convert to fraction form
   42,672/63,840 = 63,840/x
3. Step 3: Cross multiply
   42,672x = 63,840 × 63,840
4. Step 4: Simplify right side
   42,672x = 4,075,545,600
5. Step 5: Solve for x
   x = 4,075,545,600/42,672
6. Step 6: Final answer
   x = 95,508.66