Finding the Fourth Proportional to 137,413.96, 189,636.71 and 76,985.10

Step by Step Solution

1. Step 1: Write the proportion equation
   137,413.96 : 189,636.71 = 76,985.10 : x
2. Step 2: Convert to fraction form
   137,413.96/189,636.71 = 76,985.10/x
3. Step 3: Cross multiply
   137,413.96x = 189,636.71 × 76,985.10
4. Step 4: Simplify right side
   137,413.96x = 14,599,200,698.10
5. Step 5: Solve for x
   x = 14,599,200,698.10/137,413.96
6. Step 6: Final answer
   x = 106,242.49