Finding the Fourth Proportional to 1,152,613.85, 1,590,609.31 and 636,368.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152,613.85 : 1,590,609.31 = 636,368.74 : x
2. Step 2: Convert to fraction form
   1,152,613.85/1,590,609.31 = 636,368.74/x
3. Step 3: Cross multiply
   1,152,613.85x = 1,590,609.31 × 636,368.74
4. Step 4: Simplify right side
   1,152,613.85x = 1,012,214,048,054.34
5. Step 5: Solve for x
   x = 1,012,214,048,054.34/1,152,613.85
6. Step 6: Final answer
   x = 878,190.08