Finding the Fourth Proportional to 667,667.64, 920,878.74 and 463,718.82

Step by Step Solution

1. Step 1: Write the proportion equation
   667,667.64 : 920,878.74 = 463,718.82 : x
2. Step 2: Convert to fraction form
   667,667.64/920,878.74 = 463,718.82/x
3. Step 3: Cross multiply
   667,667.64x = 920,878.74 × 463,718.82
4. Step 4: Simplify right side
   667,667.64x = 427,028,802,675.89
5. Step 5: Solve for x
   x = 427,028,802,675.89/667,667.64
6. Step 6: Final answer
   x = 639,582.90