Finding the Fourth Proportional to 12,312.25, 16,991.52 and 7,007.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,312.25 : 16,991.52 = 7,007.56 : x
2. Step 2: Convert to fraction form
   12,312.25/16,991.52 = 7,007.56/x
3. Step 3: Cross multiply
   12,312.25x = 16,991.52 × 7,007.56
4. Step 4: Simplify right side
   12,312.25x = 119,069,095.89
5. Step 5: Solve for x
   x = 119,069,095.89/12,312.25
6. Step 6: Final answer
   x = 9,670.78