Finding the Fourth Proportional to 1,345,636.17, 2,018,491.37 and 434,857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345,636.17 : 2,018,491.37 = 434,857.59 : x
2. Step 2: Convert to fraction form
   1,345,636.17/2,018,491.37 = 434,857.59/x
3. Step 3: Cross multiply
   1,345,636.17x = 2,018,491.37 × 434,857.59
4. Step 4: Simplify right side
   1,345,636.17x = 877,756,290,419.71
5. Step 5: Solve for x
   x = 877,756,290,419.71/1,345,636.17
6. Step 6: Final answer
   x = 652,298.38