Finding the Fourth Proportional to 380,978.52, 571,411.62 and 100,515.48

Step by Step Solution

1. Step 1: Write the proportion equation
   380,978.52 : 571,411.62 = 100,515.48 : x
2. Step 2: Convert to fraction form
   380,978.52/571,411.62 = 100,515.48/x
3. Step 3: Cross multiply
   380,978.52x = 571,411.62 × 100,515.48
4. Step 4: Simplify right side
   380,978.52x = 57,435,713,261.88
5. Step 5: Solve for x
   x = 57,435,713,261.88/380,978.52
6. Step 6: Final answer
   x = 150,758.40