Finding the Fourth Proportional to 758,984.32, 1,138,308.79 and 219,123.30

Step by Step Solution

1. Step 1: Write the proportion equation
   758,984.32 : 1,138,308.79 = 219,123.30 : x
2. Step 2: Convert to fraction form
   758,984.32/1,138,308.79 = 219,123.30/x
3. Step 3: Cross multiply
   758,984.32x = 1,138,308.79 × 219,123.30
4. Step 4: Simplify right side
   758,984.32x = 249,429,978,483.81
5. Step 5: Solve for x
   x = 249,429,978,483.81/758,984.32
6. Step 6: Final answer
   x = 328,636.54