Finding the Fourth Proportional to 142,290.27, 213,427.71 and 72,167.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,290.27 : 213,427.71 = 72,167.76 : x
2. Step 2: Convert to fraction form
   142,290.27/213,427.71 = 72,167.76/x
3. Step 3: Cross multiply
   142,290.27x = 213,427.71 × 72,167.76
4. Step 4: Simplify right side
   142,290.27x = 15,402,599,752.63
5. Step 5: Solve for x
   x = 15,402,599,752.63/142,290.27
6. Step 6: Final answer
   x = 108,247.74