Finding the Fourth Proportional to 978,238.38, 1,349,395.59 and 615,086.70

Step by Step Solution

1. Step 1: Write the proportion equation
   978,238.38 : 1,349,395.59 = 615,086.70 : x
2. Step 2: Convert to fraction form
   978,238.38/1,349,395.59 = 615,086.70/x
3. Step 3: Cross multiply
   978,238.38x = 1,349,395.59 × 615,086.70
4. Step 4: Simplify right side
   978,238.38x = 829,995,280,447.65
5. Step 5: Solve for x
   x = 829,995,280,447.65/978,238.38
6. Step 6: Final answer
   x = 848,459.13