Finding the Fourth Proportional to 660,443,187.69, 911,412,185.39 and 363,090,488.99

Step by Step Solution

1. Step 1: Write the proportion equation
   660,443,187.69 : 911,412,185.39 = 363,090,488.99 : x
2. Step 2: Convert to fraction form
   660,443,187.69/911,412,185.39 = 363,090,488.99/x
3. Step 3: Cross multiply
   660,443,187.69x = 911,412,185.39 × 363,090,488.99
4. Step 4: Simplify right side
   660,443,187.69x = 330,925,096,065,162,688
5. Step 5: Solve for x
   x = 330,925,096,065,162,688/660,443,187.69
6. Step 6: Final answer
   x = 501,065,197.18