Finding the Fourth Proportional to 81,238.38, 112,112.03 and 45,428.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,238.38 : 112,112.03 = 45,428.31 : x
2. Step 2: Convert to fraction form
   81,238.38/112,112.03 = 45,428.31/x
3. Step 3: Cross multiply
   81,238.38x = 112,112.03 × 45,428.31
4. Step 4: Simplify right side
   81,238.38x = 5,093,059,826.43
5. Step 5: Solve for x
   x = 5,093,059,826.43/81,238.38
6. Step 6: Final answer
   x = 62,692.78