Finding the Fourth Proportional to 63,498.78, 87,428.34 and 53,919.72

Step by Step Solution

1. Step 1: Write the proportion equation
   63,498.78 : 87,428.34 = 53,919.72 : x
2. Step 2: Convert to fraction form
   63,498.78/87,428.34 = 53,919.72/x
3. Step 3: Cross multiply
   63,498.78x = 87,428.34 × 53,919.72
4. Step 4: Simplify right side
   63,498.78x = 4,714,111,612.86
5. Step 5: Solve for x
   x = 4,714,111,612.86/63,498.78
6. Step 6: Final answer
   x = 74,239.40