Finding the Fourth Proportional to 388,901, 536,625.06 and 219,131.48

Step by Step Solution

1. Step 1: Write the proportion equation
   388,901 : 536,625.06 = 219,131.48 : x
2. Step 2: Convert to fraction form
   388,901/536,625.06 = 219,131.48/x
3. Step 3: Cross multiply
   388,901x = 536,625.06 × 219,131.48
4. Step 4: Simplify right side
   388,901x = 117,591,443,602.89
5. Step 5: Solve for x
   x = 117,591,443,602.89/388,901
6. Step 6: Final answer
   x = 302,368.58