Finding the Fourth Proportional to 76,666.37, 105,799.57 and 42,674.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,666.37 : 105,799.57 = 42,674.12 : x
2. Step 2: Convert to fraction form
   76,666.37/105,799.57 = 42,674.12/x
3. Step 3: Cross multiply
   76,666.37x = 105,799.57 × 42,674.12
4. Step 4: Simplify right side
   76,666.37x = 4,514,902,910.45
5. Step 5: Solve for x
   x = 4,514,902,910.45/76,666.37
6. Step 6: Final answer
   x = 58,890.27