Finding the Fourth Proportional to 89,969.16, 134,880.78 and 67,739.88

Step by Step Solution

1. Step 1: Write the proportion equation
   89,969.16 : 134,880.78 = 67,739.88 : x
2. Step 2: Convert to fraction form
   89,969.16/134,880.78 = 67,739.88/x
3. Step 3: Cross multiply
   89,969.16x = 134,880.78 × 67,739.88
4. Step 4: Simplify right side
   89,969.16x = 9,136,807,851.51
5. Step 5: Solve for x
   x = 9,136,807,851.51/89,969.16
6. Step 6: Final answer
   x = 101,554.89