Finding the Fourth Proportional to 89,985.51, 134,978.97 and 30,821.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89,985.51 : 134,978.97 = 30,821.69 : x
2. Step 2: Convert to fraction form
   89,985.51/134,978.97 = 30,821.69/x
3. Step 3: Cross multiply
   89,985.51x = 134,978.97 × 30,821.69
4. Step 4: Simplify right side
   89,985.51x = 4,160,279,969.86
5. Step 5: Solve for x
   x = 4,160,279,969.86/89,985.51
6. Step 6: Final answer
   x = 46,232.78