Finding the Fourth Proportional to 64,443.78, 88,971.30 and 42,126.66

Step by Step Solution

1. Step 1: Write the proportion equation
   64,443.78 : 88,971.30 = 42,126.66 : x
2. Step 2: Convert to fraction form
   64,443.78/88,971.30 = 42,126.66/x
3. Step 3: Cross multiply
   64,443.78x = 88,971.30 × 42,126.66
4. Step 4: Simplify right side
   64,443.78x = 3,748,063,704.86
5. Step 5: Solve for x
   x = 3,748,063,704.86/64,443.78
6. Step 6: Final answer
   x = 58,160.21