Finding the Fourth Proportional to 76,143.12, 105,080.94 and 42,609.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,143.12 : 105,080.94 = 42,609.12 : x
2. Step 2: Convert to fraction form
   76,143.12/105,080.94 = 42,609.12/x
3. Step 3: Cross multiply
   76,143.12x = 105,080.94 × 42,609.12
4. Step 4: Simplify right side
   76,143.12x = 4,477,406,382.17
5. Step 5: Solve for x
   x = 4,477,406,382.17/76,143.12
6. Step 6: Final answer
   x = 58,802.51