Finding the Fourth Proportional to 910,478.62, 1,256,460.72 and 502,580.69

Step by Step Solution

1. Step 1: Write the proportion equation
   910,478.62 : 1,256,460.72 = 502,580.69 : x
2. Step 2: Convert to fraction form
   910,478.62/1,256,460.72 = 502,580.69/x
3. Step 3: Cross multiply
   910,478.62x = 1,256,460.72 × 502,580.69
4. Step 4: Simplify right side
   910,478.62x = 631,472,895,615.50
5. Step 5: Solve for x
   x = 631,472,895,615.50/910,478.62
6. Step 6: Final answer
   x = 693,561.48