Finding the Fourth Proportional to 1,390,672.00, 1,919,036.00 and 778,684.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,672.00 : 1,919,036.00 = 778,684.47 : x
2. Step 2: Convert to fraction form
   1,390,672.00/1,919,036.00 = 778,684.47/x
3. Step 3: Cross multiply
   1,390,672.00x = 1,919,036.00 × 778,684.47
4. Step 4: Simplify right side
   1,390,672.00x = 1,494,323,536,115.82
5. Step 5: Solve for x
   x = 1,494,323,536,115.82/1,390,672.00
6. Step 6: Final answer
   x = 1,074,533.42