Finding the Fourth Proportional to 78,597.12, 108,463.72 and 42,787

Step by Step Solution

1. Step 1: Write the proportion equation
   78,597.12 : 108,463.72 = 42,787 : x
2. Step 2: Convert to fraction form
   78,597.12/108,463.72 = 42,787/x
3. Step 3: Cross multiply
   78,597.12x = 108,463.72 × 42,787
4. Step 4: Simplify right side
   78,597.12x = 4,640,837,187.64
5. Step 5: Solve for x
   x = 4,640,837,187.64/78,597.12
6. Step 6: Final answer
   x = 59,045.89