Finding the Fourth Proportional to 42,443.76, 58,590.34 and 28,649.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.76 : 58,590.34 = 28,649.08 : x
2. Step 2: Convert to fraction form
   42,443.76/58,590.34 = 28,649.08/x
3. Step 3: Cross multiply
   42,443.76x = 58,590.34 × 28,649.08
4. Step 4: Simplify right side
   42,443.76x = 1,678,559,009.93
5. Step 5: Solve for x
   x = 1,678,559,009.93/42,443.76
6. Step 6: Final answer
   x = 39,547.84