Finding the Fourth Proportional to 254,156.42, 381,123.89 and 85,645.34

Step by Step Solution

1. Step 1: Write the proportion equation
   254,156.42 : 381,123.89 = 85,645.34 : x
2. Step 2: Convert to fraction form
   254,156.42/381,123.89 = 85,645.34/x
3. Step 3: Cross multiply
   254,156.42x = 381,123.89 × 85,645.34
4. Step 4: Simplify right side
   254,156.42x = 32,641,486,308.10
5. Step 5: Solve for x
   x = 32,641,486,308.10/254,156.42
6. Step 6: Final answer
   x = 128,430.70