Finding the Fourth Proportional to 78,665.84, 108,559.05 and 42,856.11

Step by Step Solution

1. Step 1: Write the proportion equation
   78,665.84 : 108,559.05 = 42,856.11 : x
2. Step 2: Convert to fraction form
   78,665.84/108,559.05 = 42,856.11/x
3. Step 3: Cross multiply
   78,665.84x = 108,559.05 × 42,856.11
4. Step 4: Simplify right side
   78,665.84x = 4,652,418,588.30
5. Step 5: Solve for x
   x = 4,652,418,588.30/78,665.84
6. Step 6: Final answer
   x = 59,141.54