Finding the Fourth Proportional to 744,614.17, 1,116,736.72 and 212,139.81

Step by Step Solution

1. Step 1: Write the proportion equation
   744,614.17 : 1,116,736.72 = 212,139.81 : x
2. Step 2: Convert to fraction form
   744,614.17/1,116,736.72 = 212,139.81/x
3. Step 3: Cross multiply
   744,614.17x = 1,116,736.72 × 212,139.81
4. Step 4: Simplify right side
   744,614.17x = 236,904,315,600.82
5. Step 5: Solve for x
   x = 236,904,315,600.82/744,614.17
6. Step 6: Final answer
   x = 318,157.14