Finding the Fourth Proportional to 152,402.89, 228,656.21 and 57,660.30

Step by Step Solution

1. Step 1: Write the proportion equation
   152,402.89 : 228,656.21 = 57,660.30 : x
2. Step 2: Convert to fraction form
   152,402.89/228,656.21 = 57,660.30/x
3. Step 3: Cross multiply
   152,402.89x = 228,656.21 × 57,660.30
4. Step 4: Simplify right side
   152,402.89x = 13,184,385,665.46
5. Step 5: Solve for x
   x = 13,184,385,665.46/152,402.89
6. Step 6: Final answer
   x = 86,510.08