Finding the Fourth Proportional to 13,458.42, 18,573.49 and 7,490.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,458.42 : 18,573.49 = 7,490.08 : x
2. Step 2: Convert to fraction form
   13,458.42/18,573.49 = 7,490.08/x
3. Step 3: Cross multiply
   13,458.42x = 18,573.49 × 7,490.08
4. Step 4: Simplify right side
   13,458.42x = 139,116,925.98
5. Step 5: Solve for x
   x = 139,116,925.98/13,458.42
6. Step 6: Final answer
   x = 10,336.79