Finding the Fourth Proportional to 69,106.05, 103,505.94 and 56,406.87

Step by Step Solution

1. Step 1: Write the proportion equation
   69,106.05 : 103,505.94 = 56,406.87 : x
2. Step 2: Convert to fraction form
   69,106.05/103,505.94 = 56,406.87/x
3. Step 3: Cross multiply
   69,106.05x = 103,505.94 × 56,406.87
4. Step 4: Simplify right side
   69,106.05x = 5,838,446,101.81
5. Step 5: Solve for x
   x = 5,838,446,101.81/69,106.05
6. Step 6: Final answer
   x = 84,485.31