Finding the Fourth Proportional to 277,300.54, 415,979.98 and 90,326.62

Step by Step Solution

1. Step 1: Write the proportion equation
   277,300.54 : 415,979.98 = 90,326.62 : x
2. Step 2: Convert to fraction form
   277,300.54/415,979.98 = 90,326.62/x
3. Step 3: Cross multiply
   277,300.54x = 415,979.98 × 90,326.62
4. Step 4: Simplify right side
   277,300.54x = 37,574,065,581.07
5. Step 5: Solve for x
   x = 37,574,065,581.07/277,300.54
6. Step 6: Final answer
   x = 135,499.43