Finding the Fourth Proportional to 116,443.80, 160,910.28 and 99,207

Step by Step Solution

1. Step 1: Write the proportion equation
   116,443.80 : 160,910.28 = 99,207 : x
2. Step 2: Convert to fraction form
   116,443.80/160,910.28 = 99,207/x
3. Step 3: Cross multiply
   116,443.80x = 160,910.28 × 99,207
4. Step 4: Simplify right side
   116,443.80x = 15,963,426,147.96
5. Step 5: Solve for x
   x = 15,963,426,147.96/116,443.80
6. Step 6: Final answer
   x = 137,091.25