Finding the Fourth Proportional to 112,172.72, 154,798.56 and 61,185.51

Step by Step Solution

1. Step 1: Write the proportion equation
   112,172.72 : 154,798.56 = 61,185.51 : x
2. Step 2: Convert to fraction form
   112,172.72/154,798.56 = 61,185.51/x
3. Step 3: Cross multiply
   112,172.72x = 154,798.56 × 61,185.51
4. Step 4: Simplify right side
   112,172.72x = 9,471,428,840.87
5. Step 5: Solve for x
   x = 9,471,428,840.87/112,172.72
6. Step 6: Final answer
   x = 84,436.12