Finding the Fourth Proportional to 9,105.54, 12,565.45 and 5,072.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.54 : 12,565.45 = 5,072.35 : x
2. Step 2: Convert to fraction form
   9,105.54/12,565.45 = 5,072.35/x
3. Step 3: Cross multiply
   9,105.54x = 12,565.45 × 5,072.35
4. Step 4: Simplify right side
   9,105.54x = 63,736,360.31
5. Step 5: Solve for x
   x = 63,736,360.31/9,105.54
6. Step 6: Final answer
   x = 6,999.73