Finding the Fourth Proportional to 112,971.39, 155,884.31 and 67,638.51

Step by Step Solution

1. Step 1: Write the proportion equation
   112,971.39 : 155,884.31 = 67,638.51 : x
2. Step 2: Convert to fraction form
   112,971.39/155,884.31 = 67,638.51/x
3. Step 3: Cross multiply
   112,971.39x = 155,884.31 × 67,638.51
4. Step 4: Simplify right side
   112,971.39x = 10,543,782,122.59
5. Step 5: Solve for x
   x = 10,543,782,122.59/112,971.39
6. Step 6: Final answer
   x = 93,331.44