Finding the Fourth Proportional to 9,355.02, 12,910.56 and 5,377.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.02 : 12,910.56 = 5,377.72 : x
2. Step 2: Convert to fraction form
   9,355.02/12,910.56 = 5,377.72/x
3. Step 3: Cross multiply
   9,355.02x = 12,910.56 × 5,377.72
4. Step 4: Simplify right side
   9,355.02x = 69,429,376.72
5. Step 5: Solve for x
   x = 69,429,376.72/9,355.02
6. Step 6: Final answer
   x = 7,421.62