Finding the Fourth Proportional to 103,211.72, 142,462.42 and 67,407.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,211.72 : 142,462.42 = 67,407.30 : x
2. Step 2: Convert to fraction form
   103,211.72/142,462.42 = 67,407.30/x
3. Step 3: Cross multiply
   103,211.72x = 142,462.42 × 67,407.30
4. Step 4: Simplify right side
   103,211.72x = 9,603,007,083.67
5. Step 5: Solve for x
   x = 9,603,007,083.67/103,211.72
6. Step 6: Final answer
   x = 93,041.83