Finding the Fourth Proportional to 42,231.39, 58,275.35 and 28,591.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,231.39 : 58,275.35 = 28,591.69 : x
2. Step 2: Convert to fraction form
   42,231.39/58,275.35 = 28,591.69/x
3. Step 3: Cross multiply
   42,231.39x = 58,275.35 × 28,591.69
4. Step 4: Simplify right side
   42,231.39x = 1,666,190,741.84
5. Step 5: Solve for x
   x = 1,666,190,741.84/42,231.39
6. Step 6: Final answer
   x = 39,453.85