Finding the Fourth Proportional to 42,642.45, 58,820.58 and 28,303.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.45 : 58,820.58 = 28,303.02 : x
2. Step 2: Convert to fraction form
   42,642.45/58,820.58 = 28,303.02/x
3. Step 3: Cross multiply
   42,642.45x = 58,820.58 × 28,303.02
4. Step 4: Simplify right side
   42,642.45x = 1,664,800,052.15
5. Step 5: Solve for x
   x = 1,664,800,052.15/42,642.45
6. Step 6: Final answer
   x = 39,040.91