Finding the Fourth Proportional to 716,978.05, 1,075,462.29 and 290,507.58

Step by Step Solution

1. Step 1: Write the proportion equation
   716,978.05 : 1,075,462.29 = 290,507.58 : x
2. Step 2: Convert to fraction form
   716,978.05/1,075,462.29 = 290,507.58/x
3. Step 3: Cross multiply
   716,978.05x = 1,075,462.29 × 290,507.58
4. Step 4: Simplify right side
   716,978.05x = 312,429,948,720.95
5. Step 5: Solve for x
   x = 312,429,948,720.95/716,978.05
6. Step 6: Final answer
   x = 435,759.43