Finding the Fourth Proportional to 105,348, 145,380.24 and 57,601.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,348 : 145,380.24 = 57,601.72 : x
2. Step 2: Convert to fraction form
   105,348/145,380.24 = 57,601.72/x
3. Step 3: Cross multiply
   105,348x = 145,380.24 × 57,601.72
4. Step 4: Simplify right side
   105,348x = 8,374,151,878.01
5. Step 5: Solve for x
   x = 8,374,151,878.01/105,348
6. Step 6: Final answer
   x = 79,490.37