Finding the Fourth Proportional to 1,429,568.13, 1,972,981.72 and 817,636.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429,568.13 : 1,972,981.72 = 817,636.01 : x
2. Step 2: Convert to fraction form
   1,429,568.13/1,972,981.72 = 817,636.01/x
3. Step 3: Cross multiply
   1,429,568.13x = 1,972,981.72 × 817,636.01
4. Step 4: Simplify right side
   1,429,568.13x = 1,613,180,897,255.56
5. Step 5: Solve for x
   x = 1,613,180,897,255.56/1,429,568.13
6. Step 6: Final answer
   x = 1,128,439.33