Finding the Fourth Proportional to 12,492.64, 18,729.69 and 7,561.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492.64 : 18,729.69 = 7,561.11 : x
2. Step 2: Convert to fraction form
   12,492.64/18,729.69 = 7,561.11/x
3. Step 3: Cross multiply
   12,492.64x = 18,729.69 × 7,561.11
4. Step 4: Simplify right side
   12,492.64x = 141,617,152.71
5. Step 5: Solve for x
   x = 141,617,152.71/12,492.64
6. Step 6: Final answer
   x = 11,336.05