Finding the Fourth Proportional to 1,008,861.31, 1,392,208.05 and 556,152.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,861.31 : 1,392,208.05 = 556,152.31 : x
2. Step 2: Convert to fraction form
   1,008,861.31/1,392,208.05 = 556,152.31/x
3. Step 3: Cross multiply
   1,008,861.31x = 1,392,208.05 × 556,152.31
4. Step 4: Simplify right side
   1,008,861.31x = 774,279,723,008.10
5. Step 5: Solve for x
   x = 774,279,723,008.10/1,008,861.31
6. Step 6: Final answer
   x = 767,478.85