Finding the Fourth Proportional to 78,017.34, 107,663.68 and 42,207.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,017.34 : 107,663.68 = 42,207.34 : x
2. Step 2: Convert to fraction form
   78,017.34/107,663.68 = 42,207.34/x
3. Step 3: Cross multiply
   78,017.34x = 107,663.68 × 42,207.34
4. Step 4: Simplify right side
   78,017.34x = 4,544,197,547.41
5. Step 5: Solve for x
   x = 4,544,197,547.41/78,017.34
6. Step 6: Final answer
   x = 58,245.99