Finding the Fourth Proportional to 105,146.01, 145,101.71 and 57,400.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,146.01 : 145,101.71 = 57,400.16 : x
2. Step 2: Convert to fraction form
   105,146.01/145,101.71 = 57,400.16/x
3. Step 3: Cross multiply
   105,146.01x = 145,101.71 × 57,400.16
4. Step 4: Simplify right side
   105,146.01x = 8,328,860,788.27
5. Step 5: Solve for x
   x = 8,328,860,788.27/105,146.01
6. Step 6: Final answer
   x = 79,212.33