Finding the Fourth Proportional to 91,980.83, 137,896.83 and 28,768.43

Step by Step Solution

1. Step 1: Write the proportion equation
   91,980.83 : 137,896.83 = 28,768.43 : x
2. Step 2: Convert to fraction form
   91,980.83/137,896.83 = 28,768.43/x
3. Step 3: Cross multiply
   91,980.83x = 137,896.83 × 28,768.43
4. Step 4: Simplify right side
   91,980.83x = 3,967,075,301.08
5. Step 5: Solve for x
   x = 3,967,075,301.08/91,980.83
6. Step 6: Final answer
   x = 43,129.37