Finding the Fourth Proportional to 18,499.60, 25,527.72 and 10,543.60

Step by Step Solution

1. Step 1: Write the proportion equation
   18,499.60 : 25,527.72 = 10,543.60 : x
2. Step 2: Convert to fraction form
   18,499.60/25,527.72 = 10,543.60/x
3. Step 3: Cross multiply
   18,499.60x = 25,527.72 × 10,543.60
4. Step 4: Simplify right side
   18,499.60x = 269,154,068.59
5. Step 5: Solve for x
   x = 269,154,068.59/18,499.60
6. Step 6: Final answer
   x = 14,549.18