Finding the Fourth Proportional to 7,298.61, 10,948.52 and 3,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,298.61 : 10,948.52 = 3,138.72 : x
2. Step 2: Convert to fraction form
   7,298.61/10,948.52 = 3,138.72/x
3. Step 3: Cross multiply
   7,298.61x = 10,948.52 × 3,138.72
4. Step 4: Simplify right side
   7,298.61x = 34,364,338.69
5. Step 5: Solve for x
   x = 34,364,338.69/7,298.61
6. Step 6: Final answer
   x = 4,708.34