Finding the Fourth Proportional to 913,308.96, 1,260,335.30 and 505,427.98

Step by Step Solution

1. Step 1: Write the proportion equation
   913,308.96 : 1,260,335.30 = 505,427.98 : x
2. Step 2: Convert to fraction form
   913,308.96/1,260,335.30 = 505,427.98/x
3. Step 3: Cross multiply
   913,308.96x = 1,260,335.30 × 505,427.98
4. Step 4: Simplify right side
   913,308.96x = 637,008,724,801.69
5. Step 5: Solve for x
   x = 637,008,724,801.69/913,308.96
6. Step 6: Final answer
   x = 697,473.42