Finding the Fourth Proportional to 42,690.24, 58,937.76 and 30,784.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,690.24 : 58,937.76 = 30,784.32 : x
2. Step 2: Convert to fraction form
   42,690.24/58,937.76 = 30,784.32/x
3. Step 3: Cross multiply
   42,690.24x = 58,937.76 × 30,784.32
4. Step 4: Simplify right side
   42,690.24x = 1,814,358,863.92
5. Step 5: Solve for x
   x = 1,814,358,863.92/42,690.24
6. Step 6: Final answer
   x = 42,500.55