Finding the Fourth Proportional to 78,018.84, 107,665.95 and 42,208.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,018.84 : 107,665.95 = 42,208.86 : x
2. Step 2: Convert to fraction form
   78,018.84/107,665.95 = 42,208.86/x
3. Step 3: Cross multiply
   78,018.84x = 107,665.95 × 42,208.86
4. Step 4: Simplify right side
   78,018.84x = 4,544,457,010.32
5. Step 5: Solve for x
   x = 4,544,457,010.32/78,018.84
6. Step 6: Final answer
   x = 58,248.20