Finding the Fourth Proportional to 105,124.86, 145,071.25 and 57,377.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,124.86 : 145,071.25 = 57,377.78 : x
2. Step 2: Convert to fraction form
   105,124.86/145,071.25 = 57,377.78/x
3. Step 3: Cross multiply
   105,124.86x = 145,071.25 × 57,377.78
4. Step 4: Simplify right side
   105,124.86x = 8,323,866,266.83
5. Step 5: Solve for x
   x = 8,323,866,266.83/105,124.86
6. Step 6: Final answer
   x = 79,180.76