Finding the Fourth Proportional to 112,479.59, 155,228.64 and 64,731.89

Step by Step Solution

1. Step 1: Write the proportion equation
   112,479.59 : 155,228.64 = 64,731.89 : x
2. Step 2: Convert to fraction form
   112,479.59/155,228.64 = 64,731.89/x
3. Step 3: Cross multiply
   112,479.59x = 155,228.64 × 64,731.89
4. Step 4: Simplify right side
   112,479.59x = 10,048,243,249.33
5. Step 5: Solve for x
   x = 10,048,243,249.33/112,479.59
6. Step 6: Final answer
   x = 89,333.92