Finding the Fourth Proportional to 76,581.42, 105,685.05 and 42,591.34

Step by Step Solution

1. Step 1: Write the proportion equation
   76,581.42 : 105,685.05 = 42,591.34 : x
2. Step 2: Convert to fraction form
   76,581.42/105,685.05 = 42,591.34/x
3. Step 3: Cross multiply
   76,581.42x = 105,685.05 × 42,591.34
4. Step 4: Simplify right side
   76,581.42x = 4,501,267,355.24
5. Step 5: Solve for x
   x = 4,501,267,355.24/76,581.42
6. Step 6: Final answer
   x = 58,777.54