Finding the Fourth Proportional to 116,611.40, 160,921.87 and 64,928.00

Step by Step Solution

1. Step 1: Write the proportion equation
   116,611.40 : 160,921.87 = 64,928.00 : x
2. Step 2: Convert to fraction form
   116,611.40/160,921.87 = 64,928.00/x
3. Step 3: Cross multiply
   116,611.40x = 160,921.87 × 64,928.00
4. Step 4: Simplify right side
   116,611.40x = 10,448,334,208.43
5. Step 5: Solve for x
   x = 10,448,334,208.43/116,611.40
6. Step 6: Final answer
   x = 89,599.60