Finding the Fourth Proportional to 42,613.20, 58,820.04 and 28,469.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,613.20 : 58,820.04 = 28,469.20 : x
2. Step 2: Convert to fraction form
   42,613.20/58,820.04 = 28,469.20/x
3. Step 3: Cross multiply
   42,613.20x = 58,820.04 × 28,469.20
4. Step 4: Simplify right side
   42,613.20x = 1,674,559,482.77
5. Step 5: Solve for x
   x = 1,674,559,482.77/42,613.20
6. Step 6: Final answer
   x = 39,296.73