Finding the Fourth Proportional to 99,698.86, 137,612.89 and 56,701.54

Step by Step Solution

1. Step 1: Write the proportion equation
   99,698.86 : 137,612.89 = 56,701.54 : x
2. Step 2: Convert to fraction form
   99,698.86/137,612.89 = 56,701.54/x
3. Step 3: Cross multiply
   99,698.86x = 137,612.89 × 56,701.54
4. Step 4: Simplify right side
   99,698.86x = 7,802,862,786.85
5. Step 5: Solve for x
   x = 7,802,862,786.85/99,698.86
6. Step 6: Final answer
   x = 78,264.31