Finding the Fourth Proportional to 1,210,411.92, 1,815,856.83 and 357,498.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210,411.92 : 1,815,856.83 = 357,498.12 : x
2. Step 2: Convert to fraction form
   1,210,411.92/1,815,856.83 = 357,498.12/x
3. Step 3: Cross multiply
   1,210,411.92x = 1,815,856.83 × 357,498.12
4. Step 4: Simplify right side
   1,210,411.92x = 649,165,402,914.16
5. Step 5: Solve for x
   x = 649,165,402,914.16/1,210,411.92
6. Step 6: Final answer
   x = 536,317.75