Finding the Fourth Proportional to 729,111.48, 1,006,053.12 and 487,005.72

Step by Step Solution

1. Step 1: Write the proportion equation
   729,111.48 : 1,006,053.12 = 487,005.72 : x
2. Step 2: Convert to fraction form
   729,111.48/1,006,053.12 = 487,005.72/x
3. Step 3: Cross multiply
   729,111.48x = 1,006,053.12 × 487,005.72
4. Step 4: Simplify right side
   729,111.48x = 489,953,624,063.85
5. Step 5: Solve for x
   x = 489,953,624,063.85/729,111.48
6. Step 6: Final answer
   x = 671,987.26