Finding the Fourth Proportional to 651,838, 978,190.84 and 267,901.72

Step by Step Solution

1. Step 1: Write the proportion equation
   651,838 : 978,190.84 = 267,901.72 : x
2. Step 2: Convert to fraction form
   651,838/978,190.84 = 267,901.72/x
3. Step 3: Cross multiply
   651,838x = 978,190.84 × 267,901.72
4. Step 4: Simplify right side
   651,838x = 262,059,008,524.25
5. Step 5: Solve for x
   x = 262,059,008,524.25/651,838
6. Step 6: Final answer
   x = 402,030.89