Finding the Fourth Proportional to 56,048.32, 77,347.28 and 30,898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   56,048.32 : 77,347.28 = 30,898.72 : x
2. Step 2: Convert to fraction form
   56,048.32/77,347.28 = 30,898.72/x
3. Step 3: Cross multiply
   56,048.32x = 77,347.28 × 30,898.72
4. Step 4: Simplify right side
   56,048.32x = 2,389,931,947.48
5. Step 5: Solve for x
   x = 2,389,931,947.48/56,048.32
6. Step 6: Final answer
   x = 42,640.56