Finding the Fourth Proportional to 369,212.18, 553,818.20 and 88,729.43

Step by Step Solution

1. Step 1: Write the proportion equation
   369,212.18 : 553,818.20 = 88,729.43 : x
2. Step 2: Convert to fraction form
   369,212.18/553,818.20 = 88,729.43/x
3. Step 3: Cross multiply
   369,212.18x = 553,818.20 × 88,729.43
4. Step 4: Simplify right side
   369,212.18x = 49,139,969,996.89
5. Step 5: Solve for x
   x = 49,139,969,996.89/369,212.18
6. Step 6: Final answer
   x = 133,094.12