Finding the Third Proportional to 6,444.56 and 9,985.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,444.56 : 9,985.78 = 9,985.78 : x
2. Step 2: Convert to fraction form
   6,444.56/9,985.78 = 9,985.78/x
3. Step 3: Cross multiply
   6,444.56x = 9,985.78 × 9,985.78
4. Step 4: Simplify right side
   6,444.56x = 99,715,827.17
5. Step 5: Solve for x
   x = 99,715,827.17/6,444.56
6. Step 6: Final answer
   x = 15,472.86