Finding the Fourth Proportional to 208,134.50, 287,225.61 and 112,641.89

Step by Step Solution

1. Step 1: Write the proportion equation
   208,134.50 : 287,225.61 = 112,641.89 : x
2. Step 2: Convert to fraction form
   208,134.50/287,225.61 = 112,641.89/x
3. Step 3: Cross multiply
   208,134.50x = 287,225.61 × 112,641.89
4. Step 4: Simplify right side
   208,134.50x = 32,353,635,566.80
5. Step 5: Solve for x
   x = 32,353,635,566.80/208,134.50
6. Step 6: Final answer
   x = 155,445.81