Finding the Fourth Proportional to 76,585.30, 105,685.86 and 42,593.68

Step by Step Solution

1. Step 1: Write the proportion equation
   76,585.30 : 105,685.86 = 42,593.68 : x
2. Step 2: Convert to fraction form
   76,585.30/105,685.86 = 42,593.68/x
3. Step 3: Cross multiply
   76,585.30x = 105,685.86 × 42,593.68
4. Step 4: Simplify right side
   76,585.30x = 4,501,549,993.20
5. Step 5: Solve for x
   x = 4,501,549,993.20/76,585.30
6. Step 6: Final answer
   x = 58,778.25