Finding the Fourth Proportional to 978,265.80, 1,349,434.84 and 615,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   978,265.80 : 1,349,434.84 = 615,114.72 : x
2. Step 2: Convert to fraction form
   978,265.80/1,349,434.84 = 615,114.72/x
3. Step 3: Cross multiply
   978,265.80x = 1,349,434.84 × 615,114.72
4. Step 4: Simplify right side
   978,265.80x = 830,057,233,764.85
5. Step 5: Solve for x
   x = 830,057,233,764.85/978,265.80
6. Step 6: Final answer
   x = 848,498.67