Finding the Fourth Proportional to 620,789.16, 932,364.72 and 385,774.08

Step by Step Solution

1. Step 1: Write the proportion equation
   620,789.16 : 932,364.72 = 385,774.08 : x
2. Step 2: Convert to fraction form
   620,789.16/932,364.72 = 385,774.08/x
3. Step 3: Cross multiply
   620,789.16x = 932,364.72 × 385,774.08
4. Step 4: Simplify right side
   620,789.16x = 359,682,142,082.46
5. Step 5: Solve for x
   x = 359,682,142,082.46/620,789.16
6. Step 6: Final answer
   x = 579,395.01