Finding the Fourth Proportional to 901,978.06, 1,244,257.81 and 557,703.94

Step by Step Solution

1. Step 1: Write the proportion equation
   901,978.06 : 1,244,257.81 = 557,703.94 : x
2. Step 2: Convert to fraction form
   901,978.06/1,244,257.81 = 557,703.94/x
3. Step 3: Cross multiply
   901,978.06x = 1,244,257.81 × 557,703.94
4. Step 4: Simplify right side
   901,978.06x = 693,927,483,012.77
5. Step 5: Solve for x
   x = 693,927,483,012.77/901,978.06
6. Step 6: Final answer
   x = 769,339.65