Finding the Fourth Proportional to 8,709.86, 12,019.83 and 5,125.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,709.86 : 12,019.83 = 5,125.07 : x
2. Step 2: Convert to fraction form
   8,709.86/12,019.83 = 5,125.07/x
3. Step 3: Cross multiply
   8,709.86x = 12,019.83 × 5,125.07
4. Step 4: Simplify right side
   8,709.86x = 61,602,384.41
5. Step 5: Solve for x
   x = 61,602,384.41/8,709.86
6. Step 6: Final answer
   x = 7,072.72