Finding the Fourth Proportional to 620,483.34, 856,173.77 and 348,499.15

Step by Step Solution

1. Step 1: Write the proportion equation
   620,483.34 : 856,173.77 = 348,499.15 : x
2. Step 2: Convert to fraction form
   620,483.34/856,173.77 = 348,499.15/x
3. Step 3: Cross multiply
   620,483.34x = 856,173.77 × 348,499.15
4. Step 4: Simplify right side
   620,483.34x = 298,375,827,214.37
5. Step 5: Solve for x
   x = 298,375,827,214.37/620,483.34
6. Step 6: Final answer
   x = 480,876.45