Finding the Fourth Proportional to 30,916.78, 42,633.72 and 26,455.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,916.78 : 42,633.72 = 26,455.30 : x
2. Step 2: Convert to fraction form
   30,916.78/42,633.72 = 26,455.30/x
3. Step 3: Cross multiply
   30,916.78x = 42,633.72 × 26,455.30
4. Step 4: Simplify right side
   30,916.78x = 1,127,887,852.72
5. Step 5: Solve for x
   x = 1,127,887,852.72/30,916.78
6. Step 6: Final answer
   x = 36,481.41