Finding the Fourth Proportional to 52,404.21, 72,315.50 and 28,530.90

Step by Step Solution

1. Step 1: Write the proportion equation
   52,404.21 : 72,315.50 = 28,530.90 : x
2. Step 2: Convert to fraction form
   52,404.21/72,315.50 = 28,530.90/x
3. Step 3: Cross multiply
   52,404.21x = 72,315.50 × 28,530.90
4. Step 4: Simplify right side
   52,404.21x = 2,063,226,156.30
5. Step 5: Solve for x
   x = 2,063,226,156.30/52,404.21
6. Step 6: Final answer
   x = 39,371.38