Finding the Fourth Proportional to 75,870.48, 104,740.62 and 55,429.59

Step by Step Solution

1. Step 1: Write the proportion equation
   75,870.48 : 104,740.62 = 55,429.59 : x
2. Step 2: Convert to fraction form
   75,870.48/104,740.62 = 55,429.59/x
3. Step 3: Cross multiply
   75,870.48x = 104,740.62 × 55,429.59
4. Step 4: Simplify right side
   75,870.48x = 5,805,729,807.86
5. Step 5: Solve for x
   x = 5,805,729,807.86/75,870.48
6. Step 6: Final answer
   x = 76,521.59