Finding the Fourth Proportional to 75,111.69, 103,724.39 and 48,300.78

Step by Step Solution

1. Step 1: Write the proportion equation
   75,111.69 : 103,724.39 = 48,300.78 : x
2. Step 2: Convert to fraction form
   75,111.69/103,724.39 = 48,300.78/x
3. Step 3: Cross multiply
   75,111.69x = 103,724.39 × 48,300.78
4. Step 4: Simplify right side
   75,111.69x = 5,009,968,557.51
5. Step 5: Solve for x
   x = 5,009,968,557.51/75,111.69
6. Step 6: Final answer
   x = 66,700.25