Finding the Fourth Proportional to 1,528,957.31, 2,109,916.42 and 840,628.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528,957.31 : 2,109,916.42 = 840,628.42 : x
2. Step 2: Convert to fraction form
   1,528,957.31/2,109,916.42 = 840,628.42/x
3. Step 3: Cross multiply
   1,528,957.31x = 2,109,916.42 × 840,628.42
4. Step 4: Simplify right side
   1,528,957.31x = 1,773,655,699,100.29
5. Step 5: Solve for x
   x = 1,773,655,699,100.29/1,528,957.31
6. Step 6: Final answer
   x = 1,160,042.66