Finding the Fourth Proportional to 72,369.05, 107,561.22 and 70,405.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,369.05 : 107,561.22 = 70,405.61 : x
2. Step 2: Convert to fraction form
   72,369.05/107,561.22 = 70,405.61/x
3. Step 3: Cross multiply
   72,369.05x = 107,561.22 × 70,405.61
4. Step 4: Simplify right side
   72,369.05x = 7,572,912,504.62
5. Step 5: Solve for x
   x = 7,572,912,504.62/72,369.05
6. Step 6: Final answer
   x = 104,642.98