Finding the Fourth Proportional to 143,112.32, 197,495.70 and 89,428.52

Step by Step Solution

1. Step 1: Write the proportion equation
   143,112.32 : 197,495.70 = 89,428.52 : x
2. Step 2: Convert to fraction form
   143,112.32/197,495.70 = 89,428.52/x
3. Step 3: Cross multiply
   143,112.32x = 197,495.70 × 89,428.52
4. Step 4: Simplify right side
   143,112.32x = 17,661,748,157.36
5. Step 5: Solve for x
   x = 17,661,748,157.36/143,112.32
6. Step 6: Final answer
   x = 123,411.79