Finding the Fourth Proportional to 78,677.34, 108,573.35 and 42,867.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,677.34 : 108,573.35 = 42,867.61 : x
2. Step 2: Convert to fraction form
   78,677.34/108,573.35 = 42,867.61/x
3. Step 3: Cross multiply
   78,677.34x = 108,573.35 × 42,867.61
4. Step 4: Simplify right side
   78,677.34x = 4,654,279,266.99
5. Step 5: Solve for x
   x = 4,654,279,266.99/78,677.34
6. Step 6: Final answer
   x = 59,156.54