Finding the Fourth Proportional to 111,672.05, 155,990.95 and 111,672.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,672.05 : 155,990.95 = 111,672.05 : x
2. Step 2: Convert to fraction form
   111,672.05/155,990.95 = 111,672.05/x
3. Step 3: Cross multiply
   111,672.05x = 155,990.95 × 111,672.05
4. Step 4: Simplify right side
   111,672.05x = 17,419,829,167.95
5. Step 5: Solve for x
   x = 17,419,829,167.95/111,672.05
6. Step 6: Final answer
   x = 155,990.95