Finding the Fourth Proportional to 78,679.05, 108,575.71 and 42,869.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,679.05 : 108,575.71 = 42,869.35 : x
2. Step 2: Convert to fraction form
   78,679.05/108,575.71 = 42,869.35/x
3. Step 3: Cross multiply
   78,679.05x = 108,575.71 × 42,869.35
4. Step 4: Simplify right side
   78,679.05x = 4,654,570,113.49
5. Step 5: Solve for x
   x = 4,654,570,113.49/78,679.05
6. Step 6: Final answer
   x = 59,158.95