Finding the Fourth Proportional to 445,100.31, 667,707.06 and 141,386.12

Step by Step Solution

1. Step 1: Write the proportion equation
   445,100.31 : 667,707.06 = 141,386.12 : x
2. Step 2: Convert to fraction form
   445,100.31/667,707.06 = 141,386.12/x
3. Step 3: Cross multiply
   445,100.31x = 667,707.06 × 141,386.12
4. Step 4: Simplify right side
   445,100.31x = 94,404,510,510.01
5. Step 5: Solve for x
   x = 94,404,510,510.01/445,100.31
6. Step 6: Final answer
   x = 212,097.16