Finding the Fourth Proportional to 78,559.72, 108,412.62 and 42,749.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,559.72 : 108,412.62 = 42,749.72 : x
2. Step 2: Convert to fraction form
   78,559.72/108,412.62 = 42,749.72/x
3. Step 3: Cross multiply
   78,559.72x = 108,412.62 × 42,749.72
4. Step 4: Simplify right side
   78,559.72x = 4,634,609,149.47
5. Step 5: Solve for x
   x = 4,634,609,149.47/78,559.72
6. Step 6: Final answer
   x = 58,994.73