Finding the Fourth Proportional to 91,978.83, 137,893.83 and 28,766.43

Step by Step Solution

1. Step 1: Write the proportion equation
   91,978.83 : 137,893.83 = 28,766.43 : x
2. Step 2: Convert to fraction form
   91,978.83/137,893.83 = 28,766.43/x
3. Step 3: Cross multiply
   91,978.83x = 137,893.83 × 28,766.43
4. Step 4: Simplify right side
   91,978.83x = 3,966,713,208.13
5. Step 5: Solve for x
   x = 3,966,713,208.13/91,978.83
6. Step 6: Final answer
   x = 43,126.37