Finding the Fourth Proportional to 289,128.83, 433,715.18 and 89,469.41

Step by Step Solution

1. Step 1: Write the proportion equation
   289,128.83 : 433,715.18 = 89,469.41 : x
2. Step 2: Convert to fraction form
   289,128.83/433,715.18 = 89,469.41/x
3. Step 3: Cross multiply
   289,128.83x = 433,715.18 × 89,469.41
4. Step 4: Simplify right side
   289,128.83x = 38,804,238,646.72
5. Step 5: Solve for x
   x = 38,804,238,646.72/289,128.83
6. Step 6: Final answer
   x = 134,210.90