Finding the Fourth Proportional to 998,260.10, 1,495,057.35 and 978,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   998,260.10 : 1,495,057.35 = 978,215.30 : x
2. Step 2: Convert to fraction form
   998,260.10/1,495,057.35 = 978,215.30/x
3. Step 3: Cross multiply
   998,260.10x = 1,495,057.35 × 978,215.30
4. Step 4: Simplify right side
   998,260.10x = 1,462,487,974,147.46
5. Step 5: Solve for x
   x = 1,462,487,974,147.46/998,260.10
6. Step 6: Final answer
   x = 1,465,036.99