Finding the Fourth Proportional to 112,424.22, 155,074.07 and 85,507.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,424.22 : 155,074.07 = 85,507.72 : x
2. Step 2: Convert to fraction form
   112,424.22/155,074.07 = 85,507.72/x
3. Step 3: Cross multiply
   112,424.22x = 155,074.07 × 85,507.72
4. Step 4: Simplify right side
   112,424.22x = 13,260,030,156.82
5. Step 5: Solve for x
   x = 13,260,030,156.82/112,424.22
6. Step 6: Final answer
   x = 117,946.38