Finding the Third Proportional to 287,377.88 and 390,466.83

Step by Step Solution

1. Step 1: Write the proportion equation
   287,377.88 : 390,466.83 = 390,466.83 : x
2. Step 2: Convert to fraction form
   287,377.88/390,466.83 = 390,466.83/x
3. Step 3: Cross multiply
   287,377.88x = 390,466.83 × 390,466.83
4. Step 4: Simplify right side
   287,377.88x = 152,464,343,866.00
5. Step 5: Solve for x
   x = 152,464,343,866.00/287,377.88
6. Step 6: Final answer
   x = 530,536.12