Finding the Fourth Proportional to 76,299.89, 105,293.30 and 42,308.36

Step by Step Solution

1. Step 1: Write the proportion equation
   76,299.89 : 105,293.30 = 42,308.36 : x
2. Step 2: Convert to fraction form
   76,299.89/105,293.30 = 42,308.36/x
3. Step 3: Cross multiply
   76,299.89x = 105,293.30 × 42,308.36
4. Step 4: Simplify right side
   76,299.89x = 4,454,786,421.29
5. Step 5: Solve for x
   x = 4,454,786,421.29/76,299.89
6. Step 6: Final answer
   x = 58,385.23