Finding the Fourth Proportional to 287,105.50, 430,661.90 and 100,117

Step by Step Solution

1. Step 1: Write the proportion equation
   287,105.50 : 430,661.90 = 100,117 : x
2. Step 2: Convert to fraction form
   287,105.50/430,661.90 = 100,117/x
3. Step 3: Cross multiply
   287,105.50x = 430,661.90 × 100,117
4. Step 4: Simplify right side
   287,105.50x = 43,116,576,941.72
5. Step 5: Solve for x
   x = 43,116,576,941.72/287,105.50
6. Step 6: Final answer
   x = 150,176.77