Finding the Fourth Proportional to 78,181.86, 107,889.75 and 42,371.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,181.86 : 107,889.75 = 42,371.58 : x
2. Step 2: Convert to fraction form
   78,181.86/107,889.75 = 42,371.58/x
3. Step 3: Cross multiply
   78,181.86x = 107,889.75 × 42,371.58
4. Step 4: Simplify right side
   78,181.86x = 4,571,459,173.31
5. Step 5: Solve for x
   x = 4,571,459,173.31/78,181.86
6. Step 6: Final answer
   x = 58,472.12