Finding the Fourth Proportional to 76,771.34, 105,947.72 and 42,779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,771.34 : 105,947.72 = 42,779.86 : x
2. Step 2: Convert to fraction form
   76,771.34/105,947.72 = 42,779.86/x
3. Step 3: Cross multiply
   76,771.34x = 105,947.72 × 42,779.86
4. Step 4: Simplify right side
   76,771.34x = 4,532,429,147.17
5. Step 5: Solve for x
   x = 4,532,429,147.17/76,771.34
6. Step 6: Final answer
   x = 59,038.04