Finding the Fourth Proportional to 78,700.53, 108,603.56 and 42,889.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,700.53 : 108,603.56 = 42,889.76 : x
2. Step 2: Convert to fraction form
   78,700.53/108,603.56 = 42,889.76/x
3. Step 3: Cross multiply
   78,700.53x = 108,603.56 × 42,889.76
4. Step 4: Simplify right side
   78,700.53x = 4,657,980,623.55
5. Step 5: Solve for x
   x = 4,657,980,623.55/78,700.53
6. Step 6: Final answer
   x = 59,186.14