Finding the Fourth Proportional to 1,154,404.51, 1,593,080.38 and 645,106.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,154,404.51 : 1,593,080.38 = 645,106.88 : x
2. Step 2: Convert to fraction form
   1,154,404.51/1,593,080.38 = 645,106.88/x
3. Step 3: Cross multiply
   1,154,404.51x = 1,593,080.38 × 645,106.88
4. Step 4: Simplify right side
   1,154,404.51x = 1,027,707,118,320.10
5. Step 5: Solve for x
   x = 1,027,707,118,320.10/1,154,404.51
6. Step 6: Final answer
   x = 890,248.71