Finding the Fourth Proportional to 499,117.02, 748,801.83 and 139,287.83

Step by Step Solution

1. Step 1: Write the proportion equation
   499,117.02 : 748,801.83 = 139,287.83 : x
2. Step 2: Convert to fraction form
   499,117.02/748,801.83 = 139,287.83/x
3. Step 3: Cross multiply
   499,117.02x = 748,801.83 × 139,287.83
4. Step 4: Simplify right side
   499,117.02x = 104,298,978,256.72
5. Step 5: Solve for x
   x = 104,298,978,256.72/499,117.02
6. Step 6: Final answer
   x = 208,966.98