Finding the Fourth Proportional to 998,280.10, 1,495,087.35 and 978,235.30

Step by Step Solution

1. Step 1: Write the proportion equation
   998,280.10 : 1,495,087.35 = 978,235.30 : x
2. Step 2: Convert to fraction form
   998,280.10/1,495,087.35 = 978,235.30/x
3. Step 3: Cross multiply
   998,280.10x = 1,495,087.35 × 978,235.30
4. Step 4: Simplify right side
   998,280.10x = 1,462,547,222,353.46
5. Step 5: Solve for x
   x = 1,462,547,222,353.46/998,280.10
6. Step 6: Final answer
   x = 1,465,066.99