Finding the Fourth Proportional to 111,965.10, 156,958.50 and 111,965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,965.10 : 156,958.50 = 111,965.10 : x
2. Step 2: Convert to fraction form
   111,965.10/156,958.50 = 111,965.10/x
3. Step 3: Cross multiply
   111,965.10x = 156,958.50 × 111,965.10
4. Step 4: Simplify right side
   111,965.10x = 17,573,874,148.35
5. Step 5: Solve for x
   x = 17,573,874,148.35/111,965.10
6. Step 6: Final answer
   x = 156,958.50