Finding the Fourth Proportional to 71,002.72, 105,922.62 and 69,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   71,002.72 : 105,922.62 = 69,072.24 : x
2. Step 2: Convert to fraction form
   71,002.72/105,922.62 = 69,072.24/x
3. Step 3: Cross multiply
   71,002.72x = 105,922.62 × 69,072.24
4. Step 4: Simplify right side
   71,002.72x = 7,316,312,630.07
5. Step 5: Solve for x
   x = 7,316,312,630.07/71,002.72
6. Step 6: Final answer
   x = 103,042.71