Finding the Fourth Proportional to 116,420.79, 160,674 and 64,743.03

Step by Step Solution

1. Step 1: Write the proportion equation
   116,420.79 : 160,674 = 64,743.03 : x
2. Step 2: Convert to fraction form
   116,420.79/160,674 = 64,743.03/x
3. Step 3: Cross multiply
   116,420.79x = 160,674 × 64,743.03
4. Step 4: Simplify right side
   116,420.79x = 10,402,521,602.22
5. Step 5: Solve for x
   x = 10,402,521,602.22/116,420.79
6. Step 6: Final answer
   x = 89,352.78