Finding the Fourth Proportional to 1,123,274.77, 1,549,938.16 and 639,849.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,274.77 : 1,549,938.16 = 639,849.35 : x
2. Step 2: Convert to fraction form
   1,123,274.77/1,549,938.16 = 639,849.35/x
3. Step 3: Cross multiply
   1,123,274.77x = 1,549,938.16 × 639,849.35
4. Step 4: Simplify right side
   1,123,274.77x = 991,726,924,216.20
5. Step 5: Solve for x
   x = 991,726,924,216.20/1,123,274.77
6. Step 6: Final answer
   x = 882,888.99