Finding the Fourth Proportional to 102,433.56, 141,366.78 and 57,105.42

Step by Step Solution

1. Step 1: Write the proportion equation
   102,433.56 : 141,366.78 = 57,105.42 : x
2. Step 2: Convert to fraction form
   102,433.56/141,366.78 = 57,105.42/x
3. Step 3: Cross multiply
   102,433.56x = 141,366.78 × 57,105.42
4. Step 4: Simplify right side
   102,433.56x = 8,072,809,345.95
5. Step 5: Solve for x
   x = 8,072,809,345.95/102,433.56
6. Step 6: Final answer
   x = 78,810.20