Finding the Fourth Proportional to 102,958.38, 142,099.59 and 70,666.47

Step by Step Solution

1. Step 1: Write the proportion equation
   102,958.38 : 142,099.59 = 70,666.47 : x
2. Step 2: Convert to fraction form
   102,958.38/142,099.59 = 70,666.47/x
3. Step 3: Cross multiply
   102,958.38x = 142,099.59 × 70,666.47
4. Step 4: Simplify right side
   102,958.38x = 10,041,676,413.75
5. Step 5: Solve for x
   x = 10,041,676,413.75/102,958.38
6. Step 6: Final answer
   x = 97,531.41