Finding the Fourth Proportional to 978,267.80, 1,349,437.60 and 615,116.72

Step by Step Solution

1. Step 1: Write the proportion equation
   978,267.80 : 1,349,437.60 = 615,116.72 : x
2. Step 2: Convert to fraction form
   978,267.80/1,349,437.60 = 615,116.72/x
3. Step 3: Cross multiply
   978,267.80x = 1,349,437.60 × 615,116.72
4. Step 4: Simplify right side
   978,267.80x = 830,061,630,356.67
5. Step 5: Solve for x
   x = 830,061,630,356.67/978,267.80
6. Step 6: Final answer
   x = 848,501.43