Finding the Fourth Proportional to 212,849.56, 319,272.72 and 88,190.56

Step by Step Solution

1. Step 1: Write the proportion equation
   212,849.56 : 319,272.72 = 88,190.56 : x
2. Step 2: Convert to fraction form
   212,849.56/319,272.72 = 88,190.56/x
3. Step 3: Cross multiply
   212,849.56x = 319,272.72 × 88,190.56
4. Step 4: Simplify right side
   212,849.56x = 28,156,839,969.52
5. Step 5: Solve for x
   x = 28,156,839,969.52/212,849.56
6. Step 6: Final answer
   x = 132,285.17