Finding the Fourth Proportional to 76,574.72, 105,677.92 and 42,590.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,574.72 : 105,677.92 = 42,590.76 : x
2. Step 2: Convert to fraction form
   76,574.72/105,677.92 = 42,590.76/x
3. Step 3: Cross multiply
   76,574.72x = 105,677.92 × 42,590.76
4. Step 4: Simplify right side
   76,574.72x = 4,500,902,928.02
5. Step 5: Solve for x
   x = 4,500,902,928.02/76,574.72
6. Step 6: Final answer
   x = 58,777.92