Finding the Fourth Proportional to 875,667.60, 1,208,422.72 and 493,693.36

Step by Step Solution

1. Step 1: Write the proportion equation
   875,667.60 : 1,208,422.72 = 493,693.36 : x
2. Step 2: Convert to fraction form
   875,667.60/1,208,422.72 = 493,693.36/x
3. Step 3: Cross multiply
   875,667.60x = 1,208,422.72 × 493,693.36
4. Step 4: Simplify right side
   875,667.60x = 596,590,272,937.14
5. Step 5: Solve for x
   x = 596,590,272,937.14/875,667.60
6. Step 6: Final answer
   x = 681,297.64