Finding the Fourth Proportional to 661,333.50, 912,646.71 and 359,533.98

Step by Step Solution

1. Step 1: Write the proportion equation
   661,333.50 : 912,646.71 = 359,533.98 : x
2. Step 2: Convert to fraction form
   661,333.50/912,646.71 = 359,533.98/x
3. Step 3: Cross multiply
   661,333.50x = 912,646.71 × 359,533.98
4. Step 4: Simplify right side
   661,333.50x = 328,127,503,980.21
5. Step 5: Solve for x
   x = 328,127,503,980.21/661,333.50
6. Step 6: Final answer
   x = 496,160.42