Finding the Fourth Proportional to 9,355.84, 12,910.98 and 5,164

Step by Step Solution

1. Step 1: Write the proportion equation
   9,355.84 : 12,910.98 = 5,164 : x
2. Step 2: Convert to fraction form
   9,355.84/12,910.98 = 5,164/x
3. Step 3: Cross multiply
   9,355.84x = 12,910.98 × 5,164
4. Step 4: Simplify right side
   9,355.84x = 66,672,300.72
5. Step 5: Solve for x
   x = 66,672,300.72/9,355.84
6. Step 6: Final answer
   x = 7,126.28