Finding the Fourth Proportional to 9,191.57, 12,686.98 and 5,416.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,191.57 : 12,686.98 = 5,416.93 : x
2. Step 2: Convert to fraction form
   9,191.57/12,686.98 = 5,416.93/x
3. Step 3: Cross multiply
   9,191.57x = 12,686.98 × 5,416.93
4. Step 4: Simplify right side
   9,191.57x = 68,724,437.31
5. Step 5: Solve for x
   x = 68,724,437.31/9,191.57
6. Step 6: Final answer
   x = 7,476.90