Finding the Fourth Proportional to 9,991.45, 14,985.72 and 6,282.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.45 : 14,985.72 = 6,282.31 : x
2. Step 2: Convert to fraction form
   9,991.45/14,985.72 = 6,282.31/x
3. Step 3: Cross multiply
   9,991.45x = 14,985.72 × 6,282.31
4. Step 4: Simplify right side
   9,991.45x = 94,144,938.61
5. Step 5: Solve for x
   x = 94,144,938.61/9,991.45
6. Step 6: Final answer
   x = 9,422.55