Finding the Fourth Proportional to 1,276,499.81, 1,914,889.83 and 636,964.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276,499.81 : 1,914,889.83 = 636,964.51 : x
2. Step 2: Convert to fraction form
   1,276,499.81/1,914,889.83 = 636,964.51/x
3. Step 3: Cross multiply
   1,276,499.81x = 1,914,889.83 × 636,964.51
4. Step 4: Simplify right side
   1,276,499.81x = 1,219,716,862,269.93
5. Step 5: Solve for x
   x = 1,219,716,862,269.93/1,276,499.81
6. Step 6: Final answer
   x = 955,516.68