Finding the Fourth Proportional to 59,979.61, 89,948.93 and 43,290.07

Step by Step Solution

1. Step 1: Write the proportion equation
   59,979.61 : 89,948.93 = 43,290.07 : x
2. Step 2: Convert to fraction form
   59,979.61/89,948.93 = 43,290.07/x
3. Step 3: Cross multiply
   59,979.61x = 89,948.93 × 43,290.07
4. Step 4: Simplify right side
   59,979.61x = 3,893,895,026.38
5. Step 5: Solve for x
   x = 3,893,895,026.38/59,979.61
6. Step 6: Final answer
   x = 64,920.32