Finding the Fourth Proportional to 880,878.72, 1,215,613.80 and 478,470.72

Step by Step Solution

1. Step 1: Write the proportion equation
   880,878.72 : 1,215,613.80 = 478,470.72 : x
2. Step 2: Convert to fraction form
   880,878.72/1,215,613.80 = 478,470.72/x
3. Step 3: Cross multiply
   880,878.72x = 1,215,613.80 × 478,470.72
4. Step 4: Simplify right side
   880,878.72x = 581,635,610,127.94
5. Step 5: Solve for x
   x = 581,635,610,127.94/880,878.72
6. Step 6: Final answer
   x = 660,290.23