Finding the Fourth Proportional to 78,587.82, 108,453.29 and 42,780.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,587.82 : 108,453.29 = 42,780.24 : x
2. Step 2: Convert to fraction form
   78,587.82/108,453.29 = 42,780.24/x
3. Step 3: Cross multiply
   78,587.82x = 108,453.29 × 42,780.24
4. Step 4: Simplify right side
   78,587.82x = 4,639,657,561.09
5. Step 5: Solve for x
   x = 4,639,657,561.09/78,587.82
6. Step 6: Final answer
   x = 59,037.87