Finding the Fourth Proportional to 103,428.53, 155,151.70 and 28,548.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103,428.53 : 155,151.70 = 28,548.69 : x
2. Step 2: Convert to fraction form
   103,428.53/155,151.70 = 28,548.69/x
3. Step 3: Cross multiply
   103,428.53x = 155,151.70 × 28,548.69
4. Step 4: Simplify right side
   103,428.53x = 4,429,377,786.27
5. Step 5: Solve for x
   x = 4,429,377,786.27/103,428.53
6. Step 6: Final answer
   x = 42,825.49