Finding the Fourth Proportional to 105,488.16, 145,560.78 and 84,032.54

Step by Step Solution

1. Step 1: Write the proportion equation
   105,488.16 : 145,560.78 = 84,032.54 : x
2. Step 2: Convert to fraction form
   105,488.16/145,560.78 = 84,032.54/x
3. Step 3: Cross multiply
   105,488.16x = 145,560.78 × 84,032.54
4. Step 4: Simplify right side
   105,488.16x = 12,231,841,885.83
5. Step 5: Solve for x
   x = 12,231,841,885.83/105,488.16
6. Step 6: Final answer
   x = 115,954.65