Finding the Fourth Proportional to 12,005.20, 16,566.15 and 7,225.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,005.20 : 16,566.15 = 7,225.93 : x
2. Step 2: Convert to fraction form
   12,005.20/16,566.15 = 7,225.93/x
3. Step 3: Cross multiply
   12,005.20x = 16,566.15 × 7,225.93
4. Step 4: Simplify right side
   12,005.20x = 119,705,840.27
5. Step 5: Solve for x
   x = 119,705,840.27/12,005.20
6. Step 6: Final answer
   x = 9,971.17