Finding the Fourth Proportional to 301,839.10, 452,643.45 and 91,407.10

Step by Step Solution

1. Step 1: Write the proportion equation
   301,839.10 : 452,643.45 = 91,407.10 : x
2. Step 2: Convert to fraction form
   301,839.10/452,643.45 = 91,407.10/x
3. Step 3: Cross multiply
   301,839.10x = 452,643.45 × 91,407.10
4. Step 4: Simplify right side
   301,839.10x = 41,374,825,098.50
5. Step 5: Solve for x
   x = 41,374,825,098.50/301,839.10
6. Step 6: Final answer
   x = 137,075.76