Finding the Fourth Proportional to 78,089.40, 107,762.06 and 42,279.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,089.40 : 107,762.06 = 42,279.12 : x
2. Step 2: Convert to fraction form
   78,089.40/107,762.06 = 42,279.12/x
3. Step 3: Cross multiply
   78,089.40x = 107,762.06 × 42,279.12
4. Step 4: Simplify right side
   78,089.40x = 4,556,085,066.19
5. Step 5: Solve for x
   x = 4,556,085,066.19/78,089.40
6. Step 6: Final answer
   x = 58,344.48