Finding the Fourth Proportional to 346,492, 478,159.20 and 187,516

Step by Step Solution

1. Step 1: Write the proportion equation
   346,492 : 478,159.20 = 187,516 : x
2. Step 2: Convert to fraction form
   346,492/478,159.20 = 187,516/x
3. Step 3: Cross multiply
   346,492x = 478,159.20 × 187,516
4. Step 4: Simplify right side
   346,492x = 89,662,500,547.20
5. Step 5: Solve for x
   x = 89,662,500,547.20/346,492
6. Step 6: Final answer
   x = 258,772.21