Finding the Fourth Proportional to 12,907.19, 17,778.74 and 9,123.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907.19 : 17,778.74 = 9,123.86 : x
2. Step 2: Convert to fraction form
   12,907.19/17,778.74 = 9,123.86/x
3. Step 3: Cross multiply
   12,907.19x = 17,778.74 × 9,123.86
4. Step 4: Simplify right side
   12,907.19x = 162,210,659.28
5. Step 5: Solve for x
   x = 162,210,659.28/12,907.19
6. Step 6: Final answer
   x = 12,567.46