Finding the Fourth Proportional to 76,589.15, 105,692.04 and 42,597.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,589.15 : 105,692.04 = 42,597.50 : x
2. Step 2: Convert to fraction form
   76,589.15/105,692.04 = 42,597.50/x
3. Step 3: Cross multiply
   76,589.15x = 105,692.04 × 42,597.50
4. Step 4: Simplify right side
   76,589.15x = 4,502,216,673.90
5. Step 5: Solve for x
   x = 4,502,216,673.90/76,589.15
6. Step 6: Final answer
   x = 58,784.00