Finding the Fourth Proportional to 76,475.93, 105,507.32 and 56,380.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,475.93 : 105,507.32 = 56,380.59 : x
2. Step 2: Convert to fraction form
   76,475.93/105,507.32 = 56,380.59/x
3. Step 3: Cross multiply
   76,475.93x = 105,507.32 × 56,380.59
4. Step 4: Simplify right side
   76,475.93x = 5,948,564,669.02
5. Step 5: Solve for x
   x = 5,948,564,669.02/76,475.93
6. Step 6: Final answer
   x = 77,783.49