Finding the Fourth Proportional to 13,490.94, 18,617.31 and 7,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,490.94 : 18,617.31 = 7,522.50 : x
2. Step 2: Convert to fraction form
   13,490.94/18,617.31 = 7,522.50/x
3. Step 3: Cross multiply
   13,490.94x = 18,617.31 × 7,522.50
4. Step 4: Simplify right side
   13,490.94x = 140,048,714.48
5. Step 5: Solve for x
   x = 140,048,714.48/13,490.94
6. Step 6: Final answer
   x = 10,380.95