Finding the Fourth Proportional to 78,706.96, 108,615.72 and 42,897

Step by Step Solution

1. Step 1: Write the proportion equation
   78,706.96 : 108,615.72 = 42,897 : x
2. Step 2: Convert to fraction form
   78,706.96/108,615.72 = 42,897/x
3. Step 3: Cross multiply
   78,706.96x = 108,615.72 × 42,897
4. Step 4: Simplify right side
   78,706.96x = 4,659,288,540.84
5. Step 5: Solve for x
   x = 4,659,288,540.84/78,706.96
6. Step 6: Final answer
   x = 59,197.92