Finding the Fourth Proportional to 1,209,300.84, 1,812,747.60 and 577,476

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,300.84 : 1,812,747.60 = 577,476 : x
2. Step 2: Convert to fraction form
   1,209,300.84/1,812,747.60 = 577,476/x
3. Step 3: Cross multiply
   1,209,300.84x = 1,812,747.60 × 577,476
4. Step 4: Simplify right side
   1,209,300.84x = 1,046,818,233,057.60
5. Step 5: Solve for x
   x = 1,046,818,233,057.60/1,209,300.84
6. Step 6: Final answer
   x = 865,639.22