Finding the Fourth Proportional to 40,603.69, 56,031.72 and 28,521.67

Step by Step Solution

1. Step 1: Write the proportion equation
   40,603.69 : 56,031.72 = 28,521.67 : x
2. Step 2: Convert to fraction form
   40,603.69/56,031.72 = 28,521.67/x
3. Step 3: Cross multiply
   40,603.69x = 56,031.72 × 28,521.67
4. Step 4: Simplify right side
   40,603.69x = 1,598,118,227.37
5. Step 5: Solve for x
   x = 1,598,118,227.37/40,603.69
6. Step 6: Final answer
   x = 39,358.94