Finding the Fourth Proportional to 667,375.88, 920,978.71 and 380,889.81

Step by Step Solution

1. Step 1: Write the proportion equation
   667,375.88 : 920,978.71 = 380,889.81 : x
2. Step 2: Convert to fraction form
   667,375.88/920,978.71 = 380,889.81/x
3. Step 3: Cross multiply
   667,375.88x = 920,978.71 × 380,889.81
4. Step 4: Simplify right side
   667,375.88x = 350,791,404,913.72
5. Step 5: Solve for x
   x = 350,791,404,913.72/667,375.88
6. Step 6: Final answer
   x = 525,627.94