Finding the Fourth Proportional to 76,572.78, 105,673.06 and 42,590.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,572.78 : 105,673.06 = 42,590.86 : x
2. Step 2: Convert to fraction form
   76,572.78/105,673.06 = 42,590.86/x
3. Step 3: Cross multiply
   76,572.78x = 105,673.06 × 42,590.86
4. Step 4: Simplify right side
   76,572.78x = 4,500,706,504.23
5. Step 5: Solve for x
   x = 4,500,706,504.23/76,572.78
6. Step 6: Final answer
   x = 58,776.85