Finding the Fourth Proportional to 105,897.04, 146,064.16 and 89,871.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,897.04 : 146,064.16 = 89,871.12 : x
2. Step 2: Convert to fraction form
   105,897.04/146,064.16 = 89,871.12/x
3. Step 3: Cross multiply
   105,897.04x = 146,064.16 × 89,871.12
4. Step 4: Simplify right side
   105,897.04x = 13,126,949,763.40
5. Step 5: Solve for x
   x = 13,126,949,763.40/105,897.04
6. Step 6: Final answer
   x = 123,959.56