Finding the Fourth Proportional to 79,142.42, 109,215.79 and 42,842.93

Step by Step Solution

1. Step 1: Write the proportion equation
   79,142.42 : 109,215.79 = 42,842.93 : x
2. Step 2: Convert to fraction form
   79,142.42/109,215.79 = 42,842.93/x
3. Step 3: Cross multiply
   79,142.42x = 109,215.79 × 42,842.93
4. Step 4: Simplify right side
   79,142.42x = 4,679,124,611.80
5. Step 5: Solve for x
   x = 4,679,124,611.80/79,142.42
6. Step 6: Final answer
   x = 59,122.84