Finding the Fourth Proportional to 260,123.04, 390,215.82 and 91,608.54

Step by Step Solution

1. Step 1: Write the proportion equation
   260,123.04 : 390,215.82 = 91,608.54 : x
2. Step 2: Convert to fraction form
   260,123.04/390,215.82 = 91,608.54/x
3. Step 3: Cross multiply
   260,123.04x = 390,215.82 × 91,608.54
4. Step 4: Simplify right side
   260,123.04x = 35,747,101,555.10
5. Step 5: Solve for x
   x = 35,747,101,555.10/260,123.04
6. Step 6: Final answer
   x = 137,423.82