Finding the Fourth Proportional to 988,114.72, 1,363,667.52 and 558,434.56

Step by Step Solution

1. Step 1: Write the proportion equation
   988,114.72 : 1,363,667.52 = 558,434.56 : x
2. Step 2: Convert to fraction form
   988,114.72/1,363,667.52 = 558,434.56/x
3. Step 3: Cross multiply
   988,114.72x = 1,363,667.52 × 558,434.56
4. Step 4: Simplify right side
   988,114.72x = 761,519,071,517.49
5. Step 5: Solve for x
   x = 761,519,071,517.49/988,114.72
6. Step 6: Final answer
   x = 770,678.80