Finding the Fourth Proportional to 76,239.42, 105,200.55 and 42,705.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76,239.42 : 105,200.55 = 42,705.42 : x
2. Step 2: Convert to fraction form
   76,239.42/105,200.55 = 42,705.42/x
3. Step 3: Cross multiply
   76,239.42x = 105,200.55 × 42,705.42
4. Step 4: Simplify right side
   76,239.42x = 4,492,633,671.98
5. Step 5: Solve for x
   x = 4,492,633,671.98/76,239.42
6. Step 6: Final answer
   x = 58,927.96