Finding the Fourth Proportional to 76,666.34, 105,799.53 and 42,674.09

Step by Step Solution

1. Step 1: Write the proportion equation
   76,666.34 : 105,799.53 = 42,674.09 : x
2. Step 2: Convert to fraction form
   76,666.34/105,799.53 = 42,674.09/x
3. Step 3: Cross multiply
   76,666.34x = 105,799.53 × 42,674.09
4. Step 4: Simplify right side
   76,666.34x = 4,514,898,665.18
5. Step 5: Solve for x
   x = 4,514,898,665.18/76,666.34
6. Step 6: Final answer
   x = 58,890.23