Finding the Fourth Proportional to 288,683.82, 433,025.94 and 78,321.74

Step by Step Solution

1. Step 1: Write the proportion equation
   288,683.82 : 433,025.94 = 78,321.74 : x
2. Step 2: Convert to fraction form
   288,683.82/433,025.94 = 78,321.74/x
3. Step 3: Cross multiply
   288,683.82x = 433,025.94 × 78,321.74
4. Step 4: Simplify right side
   288,683.82x = 33,915,345,085.94
5. Step 5: Solve for x
   x = 33,915,345,085.94/288,683.82
6. Step 6: Final answer
   x = 117,482.67