Finding the Fourth Proportional to 696,667.15, 961,410.63 and 521,927.74

Step by Step Solution

1. Step 1: Write the proportion equation
   696,667.15 : 961,410.63 = 521,927.74 : x
2. Step 2: Convert to fraction form
   696,667.15/961,410.63 = 521,927.74/x
3. Step 3: Cross multiply
   696,667.15x = 961,410.63 × 521,927.74
4. Step 4: Simplify right side
   696,667.15x = 501,786,877,327.88
5. Step 5: Solve for x
   x = 501,786,877,327.88/696,667.15
6. Step 6: Final answer
   x = 720,267.75