Finding the Fourth Proportional to 116,128.06, 160,256.61 and 65,827.06

Step by Step Solution

1. Step 1: Write the proportion equation
   116,128.06 : 160,256.61 = 65,827.06 : x
2. Step 2: Convert to fraction form
   116,128.06/160,256.61 = 65,827.06/x
3. Step 3: Cross multiply
   116,128.06x = 160,256.61 × 65,827.06
4. Step 4: Simplify right side
   116,128.06x = 10,549,221,481.87
5. Step 5: Solve for x
   x = 10,549,221,481.87/116,128.06
6. Step 6: Final answer
   x = 90,841.28