Finding the Third Proportional to 138,928.61 and 288,758.04

Step by Step Solution

1. Step 1: Write the proportion equation
   138,928.61 : 288,758.04 = 288,758.04 : x
2. Step 2: Convert to fraction form
   138,928.61/288,758.04 = 288,758.04/x
3. Step 3: Cross multiply
   138,928.61x = 288,758.04 × 288,758.04
4. Step 4: Simplify right side
   138,928.61x = 83,381,205,123.22
5. Step 5: Solve for x
   x = 83,381,205,123.22/138,928.61
6. Step 6: Final answer
   x = 600,173.05