Finding the Fourth Proportional to 78,555.61, 108,404.97 and 42,745.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,555.61 : 108,404.97 = 42,745.72 : x
2. Step 2: Convert to fraction form
   78,555.61/108,404.97 = 42,745.72/x
3. Step 3: Cross multiply
   78,555.61x = 108,404.97 × 42,745.72
4. Step 4: Simplify right side
   78,555.61x = 4,633,848,494.23
5. Step 5: Solve for x
   x = 4,633,848,494.23/78,555.61
6. Step 6: Final answer
   x = 58,988.13