Finding the Fourth Proportional to 112,422.22, 155,071.31 and 85,505.72

Step by Step Solution

1. Step 1: Write the proportion equation
   112,422.22 : 155,071.31 = 85,505.72 : x
2. Step 2: Convert to fraction form
   112,422.22/155,071.31 = 85,505.72/x
3. Step 3: Cross multiply
   112,422.22x = 155,071.31 × 85,505.72
4. Step 4: Simplify right side
   112,422.22x = 13,259,483,451.30
5. Step 5: Solve for x
   x = 13,259,483,451.30/112,422.22
6. Step 6: Final answer
   x = 117,943.62