Finding the Fourth Proportional to 53,291.84, 79,813.24 and 42,123.60

Step by Step Solution

1. Step 1: Write the proportion equation
   53,291.84 : 79,813.24 = 42,123.60 : x
2. Step 2: Convert to fraction form
   53,291.84/79,813.24 = 42,123.60/x
3. Step 3: Cross multiply
   53,291.84x = 79,813.24 × 42,123.60
4. Step 4: Simplify right side
   53,291.84x = 3,362,020,996.46
5. Step 5: Solve for x
   x = 3,362,020,996.46/53,291.84
6. Step 6: Final answer
   x = 63,086.98