Finding the Fourth Proportional to 8,708.19, 12,017.54 and 5,123.41

Step by Step Solution

1. Step 1: Write the proportion equation
   8,708.19 : 12,017.54 = 5,123.41 : x
2. Step 2: Convert to fraction form
   8,708.19/12,017.54 = 5,123.41/x
3. Step 3: Cross multiply
   8,708.19x = 12,017.54 × 5,123.41
4. Step 4: Simplify right side
   8,708.19x = 61,570,784.61
5. Step 5: Solve for x
   x = 61,570,784.61/8,708.19
6. Step 6: Final answer
   x = 7,070.45