Finding the Fourth Proportional to 99,856.45, 137,802.83 and 56,833.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99,856.45 : 137,802.83 = 56,833.83 : x
2. Step 2: Convert to fraction form
   99,856.45/137,802.83 = 56,833.83/x
3. Step 3: Cross multiply
   99,856.45x = 137,802.83 × 56,833.83
4. Step 4: Simplify right side
   99,856.45x = 7,831,861,924.72
5. Step 5: Solve for x
   x = 7,831,861,924.72/99,856.45
6. Step 6: Final answer
   x = 78,431.21