Finding the Fourth Proportional to 390,064.89, 585,117.38 and 109,604.01

Step by Step Solution

1. Step 1: Write the proportion equation
   390,064.89 : 585,117.38 = 109,604.01 : x
2. Step 2: Convert to fraction form
   390,064.89/585,117.38 = 109,604.01/x
3. Step 3: Cross multiply
   390,064.89x = 585,117.38 × 109,604.01
4. Step 4: Simplify right side
   390,064.89x = 64,131,207,695.09
5. Step 5: Solve for x
   x = 64,131,207,695.09/390,064.89
6. Step 6: Final answer
   x = 164,411.64