Finding the Fourth Proportional to 76,406.34, 105,439.08 and 42,412.83

Step by Step Solution

1. Step 1: Write the proportion equation
   76,406.34 : 105,439.08 = 42,412.83 : x
2. Step 2: Convert to fraction form
   76,406.34/105,439.08 = 42,412.83/x
3. Step 3: Cross multiply
   76,406.34x = 105,439.08 × 42,412.83
4. Step 4: Simplify right side
   76,406.34x = 4,471,969,775.40
5. Step 5: Solve for x
   x = 4,471,969,775.40/76,406.34
6. Step 6: Final answer
   x = 58,528.78