Finding the Fourth Proportional to 78,089.76, 107,763.44 and 42,279.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,089.76 : 107,763.44 = 42,279.01 : x
2. Step 2: Convert to fraction form
   78,089.76/107,763.44 = 42,279.01/x
3. Step 3: Cross multiply
   78,089.76x = 107,763.44 × 42,279.01
4. Step 4: Simplify right side
   78,089.76x = 4,556,131,076.59
5. Step 5: Solve for x
   x = 4,556,131,076.59/78,089.76
6. Step 6: Final answer
   x = 58,344.80