Finding the Fourth Proportional to 10,931.60, 15,085.30 and 6,152.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.60 : 15,085.30 = 6,152.09 : x
2. Step 2: Convert to fraction form
   10,931.60/15,085.30 = 6,152.09/x
3. Step 3: Cross multiply
   10,931.60x = 15,085.30 × 6,152.09
4. Step 4: Simplify right side
   10,931.60x = 92,806,123.28
5. Step 5: Solve for x
   x = 92,806,123.28/10,931.60
6. Step 6: Final answer
   x = 8,489.71