Finding the Fourth Proportional to 380,300.97, 570,414.24 and 99,818.22

Step by Step Solution

1. Step 1: Write the proportion equation
   380,300.97 : 570,414.24 = 99,818.22 : x
2. Step 2: Convert to fraction form
   380,300.97/570,414.24 = 99,818.22/x
3. Step 3: Cross multiply
   380,300.97x = 570,414.24 × 99,818.22
4. Step 4: Simplify right side
   380,300.97x = 56,937,734,099.45
5. Step 5: Solve for x
   x = 56,937,734,099.45/380,300.97
6. Step 6: Final answer
   x = 149,717.56