Finding the Fourth Proportional to 143,089.02, 197,463.60 and 89,405.16

Step by Step Solution

1. Step 1: Write the proportion equation
   143,089.02 : 197,463.60 = 89,405.16 : x
2. Step 2: Convert to fraction form
   143,089.02/197,463.60 = 89,405.16/x
3. Step 3: Cross multiply
   143,089.02x = 197,463.60 × 89,405.16
4. Step 4: Simplify right side
   143,089.02x = 17,654,264,752.18
5. Step 5: Solve for x
   x = 17,654,264,752.18/143,089.02
6. Step 6: Final answer
   x = 123,379.59