Finding the Fourth Proportional to 12,873.89, 19,314.47 and 7,613.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,873.89 : 19,314.47 = 7,613.55 : x
2. Step 2: Convert to fraction form
   12,873.89/19,314.47 = 7,613.55/x
3. Step 3: Cross multiply
   12,873.89x = 19,314.47 × 7,613.55
4. Step 4: Simplify right side
   12,873.89x = 147,051,702.10
5. Step 5: Solve for x
   x = 147,051,702.10/12,873.89
6. Step 6: Final answer
   x = 11,422.47