Finding the Fourth Proportional to 1,528,885.89, 2,109,818.21 and 840,559.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528,885.89 : 2,109,818.21 = 840,559.10 : x
2. Step 2: Convert to fraction form
   1,528,885.89/2,109,818.21 = 840,559.10/x
3. Step 3: Cross multiply
   1,528,885.89x = 2,109,818.21 × 840,559.10
4. Step 4: Simplify right side
   1,528,885.89x = 1,773,426,881,009.32
5. Step 5: Solve for x
   x = 1,773,426,881,009.32/1,528,885.89
6. Step 6: Final answer
   x = 1,159,947.18