Finding the Fourth Proportional to 116,422.68, 160,661.39 and 64,737.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,422.68 : 160,661.39 = 64,737.72 : x
2. Step 2: Convert to fraction form
   116,422.68/160,661.39 = 64,737.72/x
3. Step 3: Cross multiply
   116,422.68x = 160,661.39 × 64,737.72
4. Step 4: Simplify right side
   116,422.68x = 10,400,851,756.94
5. Step 5: Solve for x
   x = 10,400,851,756.94/116,422.68
6. Step 6: Final answer
   x = 89,336.99