Finding the Fourth Proportional to 13,397.57, 18,488.56 and 7,430.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,397.57 : 18,488.56 = 7,430.12 : x
2. Step 2: Convert to fraction form
   13,397.57/18,488.56 = 7,430.12/x
3. Step 3: Cross multiply
   13,397.57x = 18,488.56 × 7,430.12
4. Step 4: Simplify right side
   13,397.57x = 137,372,219.43
5. Step 5: Solve for x
   x = 137,372,219.43/13,397.57
6. Step 6: Final answer
   x = 10,253.52