Finding the Fourth Proportional to 76,587.05, 105,682.04 and 42,590.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,587.05 : 105,682.04 = 42,590.05 : x
2. Step 2: Convert to fraction form
   76,587.05/105,682.04 = 42,590.05/x
3. Step 3: Cross multiply
   76,587.05x = 105,682.04 × 42,590.05
4. Step 4: Simplify right side
   76,587.05x = 4,501,002,890.55
5. Step 5: Solve for x
   x = 4,501,002,890.55/76,587.05
6. Step 6: Final answer
   x = 58,769.76