Finding the Fourth Proportional to 78,196.28, 107,911.02 and 42,386.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,196.28 : 107,911.02 = 42,386.18 : x
2. Step 2: Convert to fraction form
   78,196.28/107,911.02 = 42,386.18/x
3. Step 3: Cross multiply
   78,196.28x = 107,911.02 × 42,386.18
4. Step 4: Simplify right side
   78,196.28x = 4,573,935,917.70
5. Step 5: Solve for x
   x = 4,573,935,917.70/78,196.28
6. Step 6: Final answer
   x = 58,493.01