Finding the Fourth Proportional to 279,175.50, 418,802.04 and 89,591.40

Step by Step Solution

1. Step 1: Write the proportion equation
   279,175.50 : 418,802.04 = 89,591.40 : x
2. Step 2: Convert to fraction form
   279,175.50/418,802.04 = 89,591.40/x
3. Step 3: Cross multiply
   279,175.50x = 418,802.04 × 89,591.40
4. Step 4: Simplify right side
   279,175.50x = 37,521,061,086.46
5. Step 5: Solve for x
   x = 37,521,061,086.46/279,175.50
6. Step 6: Final answer
   x = 134,399.55