Finding the Fourth Proportional to 880,984, 1,215,654.78 and 518,328.10

Step by Step Solution

1. Step 1: Write the proportion equation
   880,984 : 1,215,654.78 = 518,328.10 : x
2. Step 2: Convert to fraction form
   880,984/1,215,654.78 = 518,328.10/x
3. Step 3: Cross multiply
   880,984x = 1,215,654.78 × 518,328.10
4. Step 4: Simplify right side
   880,984x = 630,108,032,373.32
5. Step 5: Solve for x
   x = 630,108,032,373.32/880,984
6. Step 6: Final answer
   x = 715,232.10