Finding the Fourth Proportional to 78,131.48, 107,821.36 and 42,322.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.48 : 107,821.36 = 42,322.20 : x
2. Step 2: Convert to fraction form
   78,131.48/107,821.36 = 42,322.20/x
3. Step 3: Cross multiply
   78,131.48x = 107,821.36 × 42,322.20
4. Step 4: Simplify right side
   78,131.48x = 4,563,237,162.19
5. Step 5: Solve for x
   x = 4,563,237,162.19/78,131.48
6. Step 6: Final answer
   x = 58,404.59