Finding the Fourth Proportional to 78,084.40, 107,755.17 and 42,274.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,084.40 : 107,755.17 = 42,274.12 : x
2. Step 2: Convert to fraction form
   78,084.40/107,755.17 = 42,274.12/x
3. Step 3: Cross multiply
   78,084.40x = 107,755.17 × 42,274.12
4. Step 4: Simplify right side
   78,084.40x = 4,555,254,987.20
5. Step 5: Solve for x
   x = 4,555,254,987.20/78,084.40
6. Step 6: Final answer
   x = 58,337.58