Finding the Fourth Proportional to 76,853.61, 106,055.37 and 42,399.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,853.61 : 106,055.37 = 42,399.72 : x
2. Step 2: Convert to fraction form
   76,853.61/106,055.37 = 42,399.72/x
3. Step 3: Cross multiply
   76,853.61x = 106,055.37 × 42,399.72
4. Step 4: Simplify right side
   76,853.61x = 4,496,717,992.50
5. Step 5: Solve for x
   x = 4,496,717,992.50/76,853.61
6. Step 6: Final answer
   x = 58,510.17