Finding the Fourth Proportional to 390,117.34, 585,196.26 and 123,898.69

Step by Step Solution

1. Step 1: Write the proportion equation
   390,117.34 : 585,196.26 = 123,898.69 : x
2. Step 2: Convert to fraction form
   390,117.34/585,196.26 = 123,898.69/x
3. Step 3: Cross multiply
   390,117.34x = 585,196.26 × 123,898.69
4. Step 4: Simplify right side
   390,117.34x = 72,505,050,006.90
5. Step 5: Solve for x
   x = 72,505,050,006.90/390,117.34
6. Step 6: Final answer
   x = 185,854.47