Finding the Fourth Proportional to 12,870.36, 19,298.34 and 5,077.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.36 : 19,298.34 = 5,077.08 : x
2. Step 2: Convert to fraction form
   12,870.36/19,298.34 = 5,077.08/x
3. Step 3: Cross multiply
   12,870.36x = 19,298.34 × 5,077.08
4. Step 4: Simplify right side
   12,870.36x = 97,979,216.05
5. Step 5: Solve for x
   x = 97,979,216.05/12,870.36
6. Step 6: Final answer
   x = 7,612.78