Finding the Fourth Proportional to 873,303.31, 1,205,061.06 and 491,321.89

Step by Step Solution

1. Step 1: Write the proportion equation
   873,303.31 : 1,205,061.06 = 491,321.89 : x
2. Step 2: Convert to fraction form
   873,303.31/1,205,061.06 = 491,321.89/x
3. Step 3: Cross multiply
   873,303.31x = 1,205,061.06 × 491,321.89
4. Step 4: Simplify right side
   873,303.31x = 592,072,877,564.60
5. Step 5: Solve for x
   x = 592,072,877,564.60/873,303.31
6. Step 6: Final answer
   x = 677,969.35