Finding the Fourth Proportional to 85,749.42, 128,638.59 and 29,574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,749.42 : 128,638.59 = 29,574.50 : x
2. Step 2: Convert to fraction form
   85,749.42/128,638.59 = 29,574.50/x
3. Step 3: Cross multiply
   85,749.42x = 128,638.59 × 29,574.50
4. Step 4: Simplify right side
   85,749.42x = 3,804,422,115.81
5. Step 5: Solve for x
   x = 3,804,422,115.81/85,749.42
6. Step 6: Final answer
   x = 44,366.74