Finding the Fourth Proportional to 275,691, 380,462.15 and 154,834.91

Step by Step Solution

1. Step 1: Write the proportion equation
   275,691 : 380,462.15 = 154,834.91 : x
2. Step 2: Convert to fraction form
   275,691/380,462.15 = 154,834.91/x
3. Step 3: Cross multiply
   275,691x = 380,462.15 × 154,834.91
4. Step 4: Simplify right side
   275,691x = 58,908,820,077.17
5. Step 5: Solve for x
   x = 58,908,820,077.17/275,691
6. Step 6: Final answer
   x = 213,676.98