Finding the Fourth Proportional to 12,749.54, 19,130.84 and 5,258.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,749.54 : 19,130.84 = 5,258.62 : x
2. Step 2: Convert to fraction form
   12,749.54/19,130.84 = 5,258.62/x
3. Step 3: Cross multiply
   12,749.54x = 19,130.84 × 5,258.62
4. Step 4: Simplify right side
   12,749.54x = 100,601,817.84
5. Step 5: Solve for x
   x = 100,601,817.84/12,749.54
6. Step 6: Final answer
   x = 7,890.62