Finding the Fourth Proportional to 39,428.18, 59,151.69 and 13,133.15

Step by Step Solution

1. Step 1: Write the proportion equation
   39,428.18 : 59,151.69 = 13,133.15 : x
2. Step 2: Convert to fraction form
   39,428.18/59,151.69 = 13,133.15/x
3. Step 3: Cross multiply
   39,428.18x = 59,151.69 × 13,133.15
4. Step 4: Simplify right side
   39,428.18x = 776,847,721.77
5. Step 5: Solve for x
   x = 776,847,721.77/39,428.18
6. Step 6: Final answer
   x = 19,702.86