Finding the Fourth Proportional to 78,779.99, 108,714.56 and 42,970.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,779.99 : 108,714.56 = 42,970.30 : x
2. Step 2: Convert to fraction form
   78,779.99/108,714.56 = 42,970.30/x
3. Step 3: Cross multiply
   78,779.99x = 108,714.56 × 42,970.30
4. Step 4: Simplify right side
   78,779.99x = 4,671,496,770.93
5. Step 5: Solve for x
   x = 4,671,496,770.93/78,779.99
6. Step 6: Final answer
   x = 59,298.01