Finding the Fourth Proportional to 9,135.41, 12,606.59 and 5,156.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,135.41 : 12,606.59 = 5,156.89 : x
2. Step 2: Convert to fraction form
   9,135.41/12,606.59 = 5,156.89/x
3. Step 3: Cross multiply
   9,135.41x = 12,606.59 × 5,156.89
4. Step 4: Simplify right side
   9,135.41x = 65,010,779.28
5. Step 5: Solve for x
   x = 65,010,779.28/9,135.41
6. Step 6: Final answer
   x = 7,116.35