Finding the Fourth Proportional to 56,141.52, 77,475.30 and 30,991.02

Step by Step Solution

1. Step 1: Write the proportion equation
   56,141.52 : 77,475.30 = 30,991.02 : x
2. Step 2: Convert to fraction form
   56,141.52/77,475.30 = 30,991.02/x
3. Step 3: Cross multiply
   56,141.52x = 77,475.30 × 30,991.02
4. Step 4: Simplify right side
   56,141.52x = 2,401,038,571.81
5. Step 5: Solve for x
   x = 2,401,038,571.81/56,141.52
6. Step 6: Final answer
   x = 42,767.61