Finding the Fourth Proportional to 905,498.45, 1,249,315.32 and 542,789.97

Step by Step Solution

1. Step 1: Write the proportion equation
   905,498.45 : 1,249,315.32 = 542,789.97 : x
2. Step 2: Convert to fraction form
   905,498.45/1,249,315.32 = 542,789.97/x
3. Step 3: Cross multiply
   905,498.45x = 1,249,315.32 × 542,789.97
4. Step 4: Simplify right side
   905,498.45x = 678,115,825,063.34
5. Step 5: Solve for x
   x = 678,115,825,063.34/905,498.45
6. Step 6: Final answer
   x = 748,886.79