Finding the Fourth Proportional to 76,143.87, 105,081.98 and 42,609.87

Step by Step Solution

1. Step 1: Write the proportion equation
   76,143.87 : 105,081.98 = 42,609.87 : x
2. Step 2: Convert to fraction form
   76,143.87/105,081.98 = 42,609.87/x
3. Step 3: Cross multiply
   76,143.87x = 105,081.98 × 42,609.87
4. Step 4: Simplify right side
   76,143.87x = 4,477,529,294.09
5. Step 5: Solve for x
   x = 4,477,529,294.09/76,143.87
6. Step 6: Final answer
   x = 58,803.54