Finding the Fourth Proportional to 279,061.81, 418,553.30 and 89,497.55

Step by Step Solution

1. Step 1: Write the proportion equation
   279,061.81 : 418,553.30 = 89,497.55 : x
2. Step 2: Convert to fraction form
   279,061.81/418,553.30 = 89,497.55/x
3. Step 3: Cross multiply
   279,061.81x = 418,553.30 × 89,497.55
4. Step 4: Simplify right side
   279,061.81x = 37,459,493,810.18
5. Step 5: Solve for x
   x = 37,459,493,810.18/279,061.81
6. Step 6: Final answer
   x = 134,233.68