Finding the Fourth Proportional to 298,870.32, 448,090.02 and 140,943

Step by Step Solution

1. Step 1: Write the proportion equation
   298,870.32 : 448,090.02 = 140,943 : x
2. Step 2: Convert to fraction form
   298,870.32/448,090.02 = 140,943/x
3. Step 3: Cross multiply
   298,870.32x = 448,090.02 × 140,943
4. Step 4: Simplify right side
   298,870.32x = 63,155,151,688.86
5. Step 5: Solve for x
   x = 63,155,151,688.86/298,870.32
6. Step 6: Final answer
   x = 211,312.89