Finding the Fourth Proportional to 156,783.30, 235,106.91 and 56,910.30

Step by Step Solution

1. Step 1: Write the proportion equation
   156,783.30 : 235,106.91 = 56,910.30 : x
2. Step 2: Convert to fraction form
   156,783.30/235,106.91 = 56,910.30/x
3. Step 3: Cross multiply
   156,783.30x = 235,106.91 × 56,910.30
4. Step 4: Simplify right side
   156,783.30x = 13,380,004,780.17
5. Step 5: Solve for x
   x = 13,380,004,780.17/156,783.30
6. Step 6: Final answer
   x = 85,340.75