Finding the Fourth Proportional to 648,870.76, 973,308.43 and 199,588.60

Step by Step Solution

1. Step 1: Write the proportion equation
   648,870.76 : 973,308.43 = 199,588.60 : x
2. Step 2: Convert to fraction form
   648,870.76/973,308.43 = 199,588.60/x
3. Step 3: Cross multiply
   648,870.76x = 973,308.43 × 199,588.60
4. Step 4: Simplify right side
   648,870.76x = 194,261,266,911.90
5. Step 5: Solve for x
   x = 194,261,266,911.90/648,870.76
6. Step 6: Final answer
   x = 299,383.60