Finding the Fourth Proportional to 326,013.56, 488,967.85 and 89,300.91

Step by Step Solution

1. Step 1: Write the proportion equation
   326,013.56 : 488,967.85 = 89,300.91 : x
2. Step 2: Convert to fraction form
   326,013.56/488,967.85 = 89,300.91/x
3. Step 3: Cross multiply
   326,013.56x = 488,967.85 × 89,300.91
4. Step 4: Simplify right side
   326,013.56x = 43,665,273,965.74
5. Step 5: Solve for x
   x = 43,665,273,965.74/326,013.56
6. Step 6: Final answer
   x = 133,936.99