Finding the Fourth Proportional to 56,852.88, 78,478.59 and 42,746.70

Step by Step Solution

1. Step 1: Write the proportion equation
   56,852.88 : 78,478.59 = 42,746.70 : x
2. Step 2: Convert to fraction form
   56,852.88/78,478.59 = 42,746.70/x
3. Step 3: Cross multiply
   56,852.88x = 78,478.59 × 42,746.70
4. Step 4: Simplify right side
   56,852.88x = 3,354,700,743.15
5. Step 5: Solve for x
   x = 3,354,700,743.15/56,852.88
6. Step 6: Final answer
   x = 59,006.70