Finding the Fourth Proportional to 13,157.86, 18,157.83 and 7,492.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,157.86 : 18,157.83 = 7,492.31 : x
2. Step 2: Convert to fraction form
   13,157.86/18,157.83 = 7,492.31/x
3. Step 3: Cross multiply
   13,157.86x = 18,157.83 × 7,492.31
4. Step 4: Simplify right side
   13,157.86x = 136,044,091.29
5. Step 5: Solve for x
   x = 136,044,091.29/13,157.86
6. Step 6: Final answer
   x = 10,339.38