Finding the Fourth Proportional to 111,673.30, 156,619.10 and 111,673.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111,673.30 : 156,619.10 = 111,673.30 : x
2. Step 2: Convert to fraction form
   111,673.30/156,619.10 = 111,673.30/x
3. Step 3: Cross multiply
   111,673.30x = 156,619.10 × 111,673.30
4. Step 4: Simplify right side
   111,673.30x = 17,490,171,740.03
5. Step 5: Solve for x
   x = 17,490,171,740.03/111,673.30
6. Step 6: Final answer
   x = 156,619.10