Finding the Fourth Proportional to 208,264.42, 287,404.50 and 112,771.40

Step by Step Solution

1. Step 1: Write the proportion equation
   208,264.42 : 287,404.50 = 112,771.40 : x
2. Step 2: Convert to fraction form
   208,264.42/287,404.50 = 112,771.40/x
3. Step 3: Cross multiply
   208,264.42x = 287,404.50 × 112,771.40
4. Step 4: Simplify right side
   208,264.42x = 32,411,007,831.30
5. Step 5: Solve for x
   x = 32,411,007,831.30/208,264.42
6. Step 6: Final answer
   x = 155,624.32