Finding the Fourth Proportional to 12,913.01, 19,368.90 and 5,116.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.01 : 19,368.90 = 5,116.35 : x
2. Step 2: Convert to fraction form
   12,913.01/19,368.90 = 5,116.35/x
3. Step 3: Cross multiply
   12,913.01x = 19,368.90 × 5,116.35
4. Step 4: Simplify right side
   12,913.01x = 99,098,071.52
5. Step 5: Solve for x
   x = 99,098,071.52/12,913.01
6. Step 6: Final answer
   x = 7,674.28