Finding the Fourth Proportional to 142,085.88, 213,222.94 and 78,088.71

Step by Step Solution

1. Step 1: Write the proportion equation
   142,085.88 : 213,222.94 = 78,088.71 : x
2. Step 2: Convert to fraction form
   142,085.88/213,222.94 = 78,088.71/x
3. Step 3: Cross multiply
   142,085.88x = 213,222.94 × 78,088.71
4. Step 4: Simplify right side
   142,085.88x = 16,650,304,327.01
5. Step 5: Solve for x
   x = 16,650,304,327.01/142,085.88
6. Step 6: Final answer
   x = 117,184.79