Finding the Fourth Proportional to 13,280.72, 19,911.86 and 4,958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,280.72 : 19,911.86 = 4,958.50 : x
2. Step 2: Convert to fraction form
   13,280.72/19,911.86 = 4,958.50/x
3. Step 3: Cross multiply
   13,280.72x = 19,911.86 × 4,958.50
4. Step 4: Simplify right side
   13,280.72x = 98,732,957.81
5. Step 5: Solve for x
   x = 98,732,957.81/13,280.72
6. Step 6: Final answer
   x = 7,434.31