Finding the Fourth Proportional to 290,336, 435,531.48 and 112,856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   290,336 : 435,531.48 = 112,856.72 : x
2. Step 2: Convert to fraction form
   290,336/435,531.48 = 112,856.72/x
3. Step 3: Cross multiply
   290,336x = 435,531.48 × 112,856.72
4. Step 4: Simplify right side
   290,336x = 49,152,654,289.55
5. Step 5: Solve for x
   x = 49,152,654,289.55/290,336
6. Step 6: Final answer
   x = 169,295.76