Finding the Fourth Proportional to 841,128.72, 1,261,381.43 and 301,300.91

Step by Step Solution

1. Step 1: Write the proportion equation
   841,128.72 : 1,261,381.43 = 301,300.91 : x
2. Step 2: Convert to fraction form
   841,128.72/1,261,381.43 = 301,300.91/x
3. Step 3: Cross multiply
   841,128.72x = 1,261,381.43 × 301,300.91
4. Step 4: Simplify right side
   841,128.72x = 380,055,372,716.10
5. Step 5: Solve for x
   x = 380,055,372,716.10/841,128.72
6. Step 6: Final answer
   x = 451,839.73