Finding the Fourth Proportional to 978,266.80, 1,349,436.22 and 615,115.72

Step by Step Solution

1. Step 1: Write the proportion equation
   978,266.80 : 1,349,436.22 = 615,115.72 : x
2. Step 2: Convert to fraction form
   978,266.80/1,349,436.22 = 615,115.72/x
3. Step 3: Cross multiply
   978,266.80x = 1,349,436.22 × 615,115.72
4. Step 4: Simplify right side
   978,266.80x = 830,059,432,059.38
5. Step 5: Solve for x
   x = 830,059,432,059.38/978,266.80
6. Step 6: Final answer
   x = 848,500.05