Finding the Fourth Proportional to 1,528,069.21, 2,108,792.42 and 916,321.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528,069.21 : 2,108,792.42 = 916,321.57 : x
2. Step 2: Convert to fraction form
   1,528,069.21/2,108,792.42 = 916,321.57/x
3. Step 3: Cross multiply
   1,528,069.21x = 2,108,792.42 × 916,321.57
4. Step 4: Simplify right side
   1,528,069.21x = 1,932,331,981,098.50
5. Step 5: Solve for x
   x = 1,932,331,981,098.50/1,528,069.21
6. Step 6: Final answer
   x = 1,264,557.89