Finding the Fourth Proportional to 116,878.72, 175,116.64 and 91,284.67

Step by Step Solution

1. Step 1: Write the proportion equation
   116,878.72 : 175,116.64 = 91,284.67 : x
2. Step 2: Convert to fraction form
   116,878.72/175,116.64 = 91,284.67/x
3. Step 3: Cross multiply
   116,878.72x = 175,116.64 × 91,284.67
4. Step 4: Simplify right side
   116,878.72x = 15,985,464,693.91
5. Step 5: Solve for x
   x = 15,985,464,693.91/116,878.72
6. Step 6: Final answer
   x = 136,769.68