Finding the Fourth Proportional to 76,581.44, 105,669.51 and 42,585.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,581.44 : 105,669.51 = 42,585.47 : x
2. Step 2: Convert to fraction form
   76,581.44/105,669.51 = 42,585.47/x
3. Step 3: Cross multiply
   76,581.44x = 105,669.51 × 42,585.47
4. Step 4: Simplify right side
   76,581.44x = 4,499,985,219.67
5. Step 5: Solve for x
   x = 4,499,985,219.67/76,581.44
6. Step 6: Final answer
   x = 58,760.78