Finding the Fourth Proportional to 89,298.45, 133,978.86 and 55,979.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,298.45 : 133,978.86 = 55,979.10 : x
2. Step 2: Convert to fraction form
   89,298.45/133,978.86 = 55,979.10/x
3. Step 3: Cross multiply
   89,298.45x = 133,978.86 × 55,979.10
4. Step 4: Simplify right side
   89,298.45x = 7,500,016,001.83
5. Step 5: Solve for x
   x = 7,500,016,001.83/89,298.45
6. Step 6: Final answer
   x = 83,988.20