Finding the Fourth Proportional to 782,700.17, 1,082,300.43 and 621,274.96

Step by Step Solution

1. Step 1: Write the proportion equation
   782,700.17 : 1,082,300.43 = 621,274.96 : x
2. Step 2: Convert to fraction form
   782,700.17/1,082,300.43 = 621,274.96/x
3. Step 3: Cross multiply
   782,700.17x = 1,082,300.43 × 621,274.96
4. Step 4: Simplify right side
   782,700.17x = 672,406,160,038.89
5. Step 5: Solve for x
   x = 672,406,160,038.89/782,700.17
6. Step 6: Final answer
   x = 859,085.24