Finding the Fourth Proportional to 74,875.38, 112,329.47 and 28,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   74,875.38 : 112,329.47 = 28,128.25 : x
2. Step 2: Convert to fraction form
   74,875.38/112,329.47 = 28,128.25/x
3. Step 3: Cross multiply
   74,875.38x = 112,329.47 × 28,128.25
4. Step 4: Simplify right side
   74,875.38x = 3,159,631,273.89
5. Step 5: Solve for x
   x = 3,159,631,273.89/74,875.38
6. Step 6: Final answer
   x = 42,198.54