Finding the Fourth Proportional to 76,351.50, 105,374.80 and 42,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,351.50 : 105,374.80 = 42,817.50 : x
2. Step 2: Convert to fraction form
   76,351.50/105,374.80 = 42,817.50/x
3. Step 3: Cross multiply
   76,351.50x = 105,374.80 × 42,817.50
4. Step 4: Simplify right side
   76,351.50x = 4,511,885,499
5. Step 5: Solve for x
   x = 4,511,885,499/76,351.50
6. Step 6: Final answer
   x = 59,093.61