Finding the Fourth Proportional to 157,978.16, 236,981.76 and 45,656.96

Step by Step Solution

1. Step 1: Write the proportion equation
   157,978.16 : 236,981.76 = 45,656.96 : x
2. Step 2: Convert to fraction form
   157,978.16/236,981.76 = 45,656.96/x
3. Step 3: Cross multiply
   157,978.16x = 236,981.76 × 45,656.96
4. Step 4: Simplify right side
   157,978.16x = 10,819,866,737.05
5. Step 5: Solve for x
   x = 10,819,866,737.05/157,978.16
6. Step 6: Final answer
   x = 68,489.64