Finding the Fourth Proportional to 116,420.72, 160,673.91 and 64,742.97

Step by Step Solution

1. Step 1: Write the proportion equation
   116,420.72 : 160,673.91 = 64,742.97 : x
2. Step 2: Convert to fraction form
   116,420.72/160,673.91 = 64,742.97/x
3. Step 3: Cross multiply
   116,420.72x = 160,673.91 × 64,742.97
4. Step 4: Simplify right side
   116,420.72x = 10,402,506,134.91
5. Step 5: Solve for x
   x = 10,402,506,134.91/116,420.72
6. Step 6: Final answer
   x = 89,352.70