Finding the Fourth Proportional to 419,116.59, 628,668.72 and 103,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   419,116.59 : 628,668.72 = 103,573.50 : x
2. Step 2: Convert to fraction form
   419,116.59/628,668.72 = 103,573.50/x
3. Step 3: Cross multiply
   419,116.59x = 628,668.72 × 103,573.50
4. Step 4: Simplify right side
   419,116.59x = 65,113,416,527.58
5. Step 5: Solve for x
   x = 65,113,416,527.58/419,116.59
6. Step 6: Final answer
   x = 155,358.72