Finding the Fourth Proportional to 890,650.63, 1,335,978.69 and 216,732.07

Step by Step Solution

1. Step 1: Write the proportion equation
   890,650.63 : 1,335,978.69 = 216,732.07 : x
2. Step 2: Convert to fraction form
   890,650.63/1,335,978.69 = 216,732.07/x
3. Step 3: Cross multiply
   890,650.63x = 1,335,978.69 × 216,732.07
4. Step 4: Simplify right side
   890,650.63x = 289,549,426,959.59
5. Step 5: Solve for x
   x = 289,549,426,959.59/890,650.63
6. Step 6: Final answer
   x = 325,098.77