Finding the Fourth Proportional to 740,978.43, 1,111,558.54 and 208,499.97

Step by Step Solution

1. Step 1: Write the proportion equation
   740,978.43 : 1,111,558.54 = 208,499.97 : x
2. Step 2: Convert to fraction form
   740,978.43/1,111,558.54 = 208,499.97/x
3. Step 3: Cross multiply
   740,978.43x = 1,111,558.54 × 208,499.97
4. Step 4: Simplify right side
   740,978.43x = 231,759,921,200.74
5. Step 5: Solve for x
   x = 231,759,921,200.74/740,978.43
6. Step 6: Final answer
   x = 312,775.53