Finding the Fourth Proportional to 78,628.05, 108,508.01 and 42,818.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,628.05 : 108,508.01 = 42,818.76 : x
2. Step 2: Convert to fraction form
   78,628.05/108,508.01 = 42,818.76/x
3. Step 3: Cross multiply
   78,628.05x = 108,508.01 × 42,818.76
4. Step 4: Simplify right side
   78,628.05x = 4,646,178,224.17
5. Step 5: Solve for x
   x = 4,646,178,224.17/78,628.05
6. Step 6: Final answer
   x = 59,090.59