Finding the Fourth Proportional to 42,779.73, 64,156.51 and 15,071.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,779.73 : 64,156.51 = 15,071.25 : x
2. Step 2: Convert to fraction form
   42,779.73/64,156.51 = 15,071.25/x
3. Step 3: Cross multiply
   42,779.73x = 64,156.51 × 15,071.25
4. Step 4: Simplify right side
   42,779.73x = 966,918,801.34
5. Step 5: Solve for x
   x = 966,918,801.34/42,779.73
6. Step 6: Final answer
   x = 22,602.27