Finding the Fourth Proportional to 99,969.32, 137,957.34 and 54,647.33

Step by Step Solution

1. Step 1: Write the proportion equation
   99,969.32 : 137,957.34 = 54,647.33 : x
2. Step 2: Convert to fraction form
   99,969.32/137,957.34 = 54,647.33/x
3. Step 3: Cross multiply
   99,969.32x = 137,957.34 × 54,647.33
4. Step 4: Simplify right side
   99,969.32x = 7,538,999,800.04
5. Step 5: Solve for x
   x = 7,538,999,800.04/99,969.32
6. Step 6: Final answer
   x = 75,413.13