Finding the Fourth Proportional to 1,218,123.33, 1,680,623.75 and 708,727.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,123.33 : 1,680,623.75 = 708,727.29 : x
2. Step 2: Convert to fraction form
   1,218,123.33/1,680,623.75 = 708,727.29/x
3. Step 3: Cross multiply
   1,218,123.33x = 1,680,623.75 × 708,727.29
4. Step 4: Simplify right side
   1,218,123.33x = 1,191,103,912,303.50
5. Step 5: Solve for x
   x = 1,191,103,912,303.50/1,218,123.33
6. Step 6: Final answer
   x = 977,818.82