Finding the Fourth Proportional to 89,178.57, 123,026.04 and 71,298.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89,178.57 : 123,026.04 = 71,298.63 : x
2. Step 2: Convert to fraction form
   89,178.57/123,026.04 = 71,298.63/x
3. Step 3: Cross multiply
   89,178.57x = 123,026.04 × 71,298.63
4. Step 4: Simplify right side
   89,178.57x = 8,771,588,106.33
5. Step 5: Solve for x
   x = 8,771,588,106.33/89,178.57
6. Step 6: Final answer
   x = 98,359.82