Finding the Fourth Proportional to 81,834.78, 112,947.50 and 51,222.07

Step by Step Solution

1. Step 1: Write the proportion equation
   81,834.78 : 112,947.50 = 51,222.07 : x
2. Step 2: Convert to fraction form
   81,834.78/112,947.50 = 51,222.07/x
3. Step 3: Cross multiply
   81,834.78x = 112,947.50 × 51,222.07
4. Step 4: Simplify right side
   81,834.78x = 5,785,404,751.33
5. Step 5: Solve for x
   x = 5,785,404,751.33/81,834.78
6. Step 6: Final answer
   x = 70,696.16