Finding the Fourth Proportional to 56,399.99, 77,934.62 and 53,667.05

Step by Step Solution

1. Step 1: Write the proportion equation
   56,399.99 : 77,934.62 = 53,667.05 : x
2. Step 2: Convert to fraction form
   56,399.99/77,934.62 = 53,667.05/x
3. Step 3: Cross multiply
   56,399.99x = 77,934.62 × 53,667.05
4. Step 4: Simplify right side
   56,399.99x = 4,182,520,892.77
5. Step 5: Solve for x
   x = 4,182,520,892.77/56,399.99
6. Step 6: Final answer
   x = 74,158.19