Finding the Fourth Proportional to 9,356.59, 12,913.05 and 5,377.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.59 : 12,913.05 = 5,377.87 : x
2. Step 2: Convert to fraction form
   9,356.59/12,913.05 = 5,377.87/x
3. Step 3: Cross multiply
   9,356.59x = 12,913.05 × 5,377.87
4. Step 4: Simplify right side
   9,356.59x = 69,444,704.20
5. Step 5: Solve for x
   x = 69,444,704.20/9,356.59
6. Step 6: Final answer
   x = 7,422.01