Finding the Fourth Proportional to 231,060.49, 318,863.44 and 129,085.98

Step by Step Solution

1. Step 1: Write the proportion equation
   231,060.49 : 318,863.44 = 129,085.98 : x
2. Step 2: Convert to fraction form
   231,060.49/318,863.44 = 129,085.98/x
3. Step 3: Cross multiply
   231,060.49x = 318,863.44 × 129,085.98
4. Step 4: Simplify right side
   231,060.49x = 41,160,798,774.89
5. Step 5: Solve for x
   x = 41,160,798,774.89/231,060.49
6. Step 6: Final answer
   x = 178,138.63