Finding the Fourth Proportional to 205,100.10, 307,516.57 and 85,123.98

Step by Step Solution

1. Step 1: Write the proportion equation
   205,100.10 : 307,516.57 = 85,123.98 : x
2. Step 2: Convert to fraction form
   205,100.10/307,516.57 = 85,123.98/x
3. Step 3: Cross multiply
   205,100.10x = 307,516.57 × 85,123.98
4. Step 4: Simplify right side
   205,100.10x = 26,177,034,141.54
5. Step 5: Solve for x
   x = 26,177,034,141.54/205,100.10
6. Step 6: Final answer
   x = 127,630.53