Finding the Fourth Proportional to 156,136,830.72, 215,470,101.72 and 86,523,373.86

Step by Step Solution

1. Step 1: Write the proportion equation
   156,136,830.72 : 215,470,101.72 = 86,523,373.86 : x
2. Step 2: Convert to fraction form
   156,136,830.72/215,470,101.72 = 86,523,373.86/x
3. Step 3: Cross multiply
   156,136,830.72x = 215,470,101.72 × 86,523,373.86
4. Step 4: Simplify right side
   156,136,830.72x = 18,643,200,166,771,788
5. Step 5: Solve for x
   x = 18,643,200,166,771,788/156,136,830.72
6. Step 6: Final answer
   x = 119,402,962.65