Finding the Fourth Proportional to 9,991.59, 14,987.37 and 2,971.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.59 : 14,987.37 = 2,971.57 : x
2. Step 2: Convert to fraction form
   9,991.59/14,987.37 = 2,971.57/x
3. Step 3: Cross multiply
   9,991.59x = 14,987.37 × 2,971.57
4. Step 4: Simplify right side
   9,991.59x = 44,536,019.07
5. Step 5: Solve for x
   x = 44,536,019.07/9,991.59
6. Step 6: Final answer
   x = 4,457.35