Finding the Fourth Proportional to 78,189.48, 107,901.09 and 42,379.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,189.48 : 107,901.09 = 42,379.20 : x
2. Step 2: Convert to fraction form
   78,189.48/107,901.09 = 42,379.20/x
3. Step 3: Cross multiply
   78,189.48x = 107,901.09 × 42,379.20
4. Step 4: Simplify right side
   78,189.48x = 4,572,761,873.33
5. Step 5: Solve for x
   x = 4,572,761,873.33/78,189.48
6. Step 6: Final answer
   x = 58,483.08