Finding the Fourth Proportional to 42,779.98, 64,156.89 and 15,071.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,779.98 : 64,156.89 = 15,071.50 : x
2. Step 2: Convert to fraction form
   42,779.98/64,156.89 = 15,071.50/x
3. Step 3: Cross multiply
   42,779.98x = 64,156.89 × 15,071.50
4. Step 4: Simplify right side
   42,779.98x = 966,940,567.64
5. Step 5: Solve for x
   x = 966,940,567.64/42,779.98
6. Step 6: Final answer
   x = 22,602.64