Finding the Fourth Proportional to 830,012.48, 1,245,407.52 and 409,058.72

Step by Step Solution

1. Step 1: Write the proportion equation
   830,012.48 : 1,245,407.52 = 409,058.72 : x
2. Step 2: Convert to fraction form
   830,012.48/1,245,407.52 = 409,058.72/x
3. Step 3: Cross multiply
   830,012.48x = 1,245,407.52 × 409,058.72
4. Step 4: Simplify right side
   830,012.48x = 509,444,806,009.57
5. Step 5: Solve for x
   x = 509,444,806,009.57/830,012.48
6. Step 6: Final answer
   x = 613,779.69