Finding the Fourth Proportional to 56,131.79, 77,460.71 and 30,638.66

Step by Step Solution

1. Step 1: Write the proportion equation
   56,131.79 : 77,460.71 = 30,638.66 : x
2. Step 2: Convert to fraction form
   56,131.79/77,460.71 = 30,638.66/x
3. Step 3: Cross multiply
   56,131.79x = 77,460.71 × 30,638.66
4. Step 4: Simplify right side
   56,131.79x = 2,373,291,816.55
5. Step 5: Solve for x
   x = 2,373,291,816.55/56,131.79
6. Step 6: Final answer
   x = 42,280.71