Finding the Fourth Proportional to 56,111.08, 77,478.78 and 53,574.16

Step by Step Solution

1. Step 1: Write the proportion equation
   56,111.08 : 77,478.78 = 53,574.16 : x
2. Step 2: Convert to fraction form
   56,111.08/77,478.78 = 53,574.16/x
3. Step 3: Cross multiply
   56,111.08x = 77,478.78 × 53,574.16
4. Step 4: Simplify right side
   56,111.08x = 4,150,860,556.32
5. Step 5: Solve for x
   x = 4,150,860,556.32/56,111.08
6. Step 6: Final answer
   x = 73,975.77