Finding the Fourth Proportional to 288,003.30, 402,271.50 and 288,003.30

Step by Step Solution

1. Step 1: Write the proportion equation
   288,003.30 : 402,271.50 = 288,003.30 : x
2. Step 2: Convert to fraction form
   288,003.30/402,271.50 = 288,003.30/x
3. Step 3: Cross multiply
   288,003.30x = 402,271.50 × 288,003.30
4. Step 4: Simplify right side
   288,003.30x = 115,855,519,495.95
5. Step 5: Solve for x
   x = 115,855,519,495.95/288,003.30
6. Step 6: Final answer
   x = 402,271.50