Finding the Fourth Proportional to 12,312.81, 16,987.52 and 7,003.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,312.81 : 16,987.52 = 7,003.87 : x
2. Step 2: Convert to fraction form
   12,312.81/16,987.52 = 7,003.87/x
3. Step 3: Cross multiply
   12,312.81x = 16,987.52 × 7,003.87
4. Step 4: Simplify right side
   12,312.81x = 118,978,356.74
5. Step 5: Solve for x
   x = 118,978,356.74/12,312.81
6. Step 6: Final answer
   x = 9,662.97