Finding the Fourth Proportional to 116,603.81, 160,910.78 and 64,920.22

Step by Step Solution

1. Step 1: Write the proportion equation
   116,603.81 : 160,910.78 = 64,920.22 : x
2. Step 2: Convert to fraction form
   116,603.81/160,910.78 = 64,920.22/x
3. Step 3: Cross multiply
   116,603.81x = 160,910.78 × 64,920.22
4. Step 4: Simplify right side
   116,603.81x = 10,446,363,237.97
5. Step 5: Solve for x
   x = 10,446,363,237.97/116,603.81
6. Step 6: Final answer
   x = 89,588.52