Finding the Fourth Proportional to 817,748.01, 1,128,492.30 and 455,164.10

Step by Step Solution

1. Step 1: Write the proportion equation
   817,748.01 : 1,128,492.30 = 455,164.10 : x
2. Step 2: Convert to fraction form
   817,748.01/1,128,492.30 = 455,164.10/x
3. Step 3: Cross multiply
   817,748.01x = 1,128,492.30 × 455,164.10
4. Step 4: Simplify right side
   817,748.01x = 513,649,182,086.43
5. Step 5: Solve for x
   x = 513,649,182,086.43/817,748.01
6. Step 6: Final answer
   x = 628,126.48